EN： Present Participle Clause (Participle Construction): Used to describe two actions happening at the same time or in close succession, performed by the same subject. 'Mixing the two liquids' is shortened from 'When I mixed the two liquids'.
中文： 现在分词引导的状语从句（分词构句）：用于描述由同一主语同时或接连发生的两个动作。“Mixing the two liquids”是由“When I mixed the two liquids”简化而来。
Walking down the street, I ran into an old friend.
走在街上时，我偶遇了一位老朋友。
EN： Noun-Noun Modifier (Noun Adjunct): A noun (color) is used to modify another noun (change) to describe the type of change. Here, 'color change' means a change in color.
中文： 名词修饰名词（名词作形容词）：一个名词（color）用来修饰另一个名词（change），以描述该变化的类型。在这里，“color change”指的是颜色上的变化。
The weather forecast predicted a sudden temperature drop.
天气预报预测气温会突然下降。
EN： This sentence uses a Participle Clause (specifically a past participle clause 'Heated slowly') to express a condition or time. It is a shortened form of 'When it was heated slowly' or 'Because it was heated slowly'. The subject of the participle clause must be the same as the subject of the main clause ('the metal').
中文： 本句使用了分词从句（特别是过去分词引导的“Heated slowly”）来表示时间或条件。这是“When it was heated slowly”或“Because it was heated slowly”的简化形式。分词从句的逻辑主语必须与主要从句的主语（“the metal”）一致。
Left in the sun, the ice melted quickly.
留在阳光下，冰块很快就融化了。
EN： The verb 'begin' can be followed by either a to-infinitive ('to bend') or a gerund ('bending') with little to no change in meaning. Here, 'began to bend' describes the initiation of an action.
中文： 动词“begin”（开始）后面可以接不定式（to + 动词原形，如“to bend”）或动名词（V-ing），两者意思几乎没有差别。在这里，“began to bend”描述了弯曲动作的开始。
The baby began to cry.
婴儿开始哭了。
EN： The perfect participle ('Having + past participle') is used to form a participle clause that expresses an action completed before the action in the main clause. It emphasizes the chronological order of events.
中文： 完成分词（Having + 过去分词）用于引导分词从句，表示该动作在主要从句的动作之前已经完成。这强调了事件发生的先后顺序。
Having finished his homework, he went out to play.
写完功课后，他就出去玩了。
EN： A participle clause (here, 'Having recorded the data') must share the same logical subject as the main clause ('we'). If the subjects were different, it would result in a dangling participle.
中文： 分词从句（此处为 'Having recorded the data'）的逻辑主语必须与主要从句的主语（'we'）一致。如果主语不同，则会造成悬空分词的语法错误。
Having arrived at the station, she realized she had lost her ticket.
到达车站后，她才发现自己把车票弄丢了。
EN： In scientific and academic contexts, presenting findings chronologically using precise grammar (like participle clauses) is highly valued because it clearly outlines the experimental procedure step-by-step.
中文： 在科學與學術情境中，使用精確的語法（如分詞子句）按時間順序呈現研究結果非常受到重視，因為這能清晰地逐步勾勒出實驗步驟。
EN： Participle Clauses (Present Participle): 'Watching closely' is a participle clause used to describe an action happening at the same time as the main verb 'noticed'. It shares the same subject ('I') as the main clause.
中文： 分词从句（现在分词）：'Watching closely' 是一个分词从句，用来描述与主句动词 'noticed' 同时发生的动作。它的逻辑主语与主句的主语（'I'）相同。
Walking down the street, I met an old friend.
走在街上时，我遇到了一位老朋友。
EN： Verbs of Perception with Bare Infinitive: The verb 'notice' can be followed by an object and a bare infinitive (verb without 'to') to indicate that the speaker observed the entire action from start to finish.
中文： 感官动词搭配原形不定式：动词 'notice'（注意到）后面可以接受词和原形不定式（不带 to 的动词），用来表示说话者完整观察了该动作从始至终的过程。
I heard the door close.
我听到门关上了。
EN： This sentence uses a Participle Clause (specifically a past participle clause) to express a reason. 'Surprised by the result' is a shortened form of 'Because we were surprised by the result'. The subject of the participle clause must be the same as the subject of the main clause ('we').
中文： 本句使用了分词从句（特别是过去分词从句）来表示原因。“Surprised by the result”是“Because we were surprised by the result”的简化形式。分词从句的逻辑主语必须与主要从句的主语（we）一致。
Exhausted by the long walk, they fell asleep quickly.
因长途跋涉而疲惫不堪，他们很快就睡着了。
EN： The phrasal verb 'run a test' means to conduct, perform, or execute a scientific experiment or procedure. 'Again' is an adverb used to indicate repetition.
中文： 短语动词“run a test”意为进行、执行科学实验或程序。副词“again”则用来表示重复进行该动作。
The scientists decided to run the test again to confirm the findings.
科学家们决定再次进行测试以确认发现。
EN： Present Participle Clauses (分詞短語): A present participle phrase (Verb-ing) can be used to describe an action that happens at the same time as the main verb, or to show the method/manner of the action. The implied subject of the participle must be the same as the subject of the main clause (in this case, 'she').
中文： 现在分词短语（Verb-ing）可用于描述与主句动词同时发生的动作，或表示该动作的方法与方式。分词短语的逻辑主语必须与主句的主语一致（在此句中为“she”）。
Using a map, we found the hidden cabin.
使用地图，我们找到了那间隐秘的小木屋。
EN： Simple Past Tense (一般過去時): Used to describe completed actions that occurred at a specific time in the past. Here, 'studied' is the past form of 'study'.
中文： 一般过去时用于描述在过去特定时间已经完成的动作。在此处，“studied”是动词“study”的过去式。
He studied the stars every night last summer.
去年夏天，他每天晚上都观察星星。
EN： This sentence uses a Participle Clause (specifically a past participle clause) to express a condition or cause. 'Left in the sun' is a shortened form of 'Because it was left in the sun' or 'When it was left in the sun'. The subject of the participle clause must be the same as the subject of the main clause ('the plant').
中文： 本句使用了分词从句（特别是过去分词从句）来表示条件或原因。「Left in the sun」是「Because it was left in the sun」（因为被留在阳光下）或「When it was left in the sun」（当被留在阳光下时）的简化形式。分词从句的逻辑主语必须与主句的主语（the plant）一致。
Kept in the fridge, the milk stays fresh for a week.
保存在冰箱里，牛奶可以保鲜一个星期。
EN： The comparative adverb 'faster' is used to modify the verb 'grew', indicating a comparison of speed. Adverbs of one syllable usually form their comparative by adding '-er'.
中文： 比较级副词「faster」用于修饰动词「grew」，表示速度上的比较。单音节副词通常在词尾加上「-er」来形成比较级。
He runs faster than his brother.
他跑得比他弟弟快。
EN： A participle clause (here, 'Not knowing the cause') is used to express a reason, condition, or time relation. It shares the same subject as the main clause ('we'). To make a participle clause negative, place 'not' directly before the participle.
中文： 分词从句（此处为 'Not knowing the cause'）用于表示原因、条件或时间关系。其逻辑主语与主句主语（'we'）相同。若要将分词从句改为否定，直接将 'not' 置于分词之前。
Not wanting to wake the baby, she walked on tiptoe.
因为不想吵醒婴儿，她蹑手蹑脚地走着。
EN： The verb 'keep' followed by a gerund (V-ing) is used to describe an action that continues or is repeated. In this sentence, 'kept asking' indicates that the action of asking happened repeatedly over a period of time.
中文： 动词 'keep' 后面接动名词（V-ing）用于描述持续或重复进行的动作。在本句中，'kept asking' 表示在一段时间内反复询问的动作。
He kept trying to solve the puzzle until he succeeded.
他不断尝试解开这个谜题，直到成功为止。
EN： Participle Clauses (Present Participle): A present participle clause (verb-ing) can be used to express the method, reason, or time of the main action when both actions share the same subject. Here, 'Measuring' describes how or while 'we' avoided mistakes.
中文： 分词从句（现在分词）：当两个动作的主语相同时，可以使用现在分词从句（动词-ing）来表示主句动作的方法、原因或时间。在这里，“Measuring（测量）”描述了“我们”如何或在什么时候避免了错误。
Working hard, she finished the project ahead of schedule.
通过努力工作，她提前完成了项目。
EN： Adverbs modifying participles: Adverbs of manner (like 'carefully') are placed after the participle ('Measuring') to describe how the action of the participle is performed.
中文： 修饰分词的副词：方式副词（如 'carefully'）放在分词（'Measuring'）之后，用来修饰该分词动作进行的方式。
Listening intently, the students took detailed notes.
专注地听着，学生们做了详细的笔记。
EN： This sentence uses a past participle clause ('Excited by...') acting as an adverbial clause of reason. It is a reduced clause where 'Because we were excited by...' is shortened. The subject of the participle clause must be the same as the subject of the main clause ('we').
中文： 本句使用了过去分词引导的分词短语（'Excited by...'），在句中作表示原因的状语从句。这是由 'Because we were excited by...' 简化而来的结构。分词短语的逻辑主语必须与主句的主语（'we'）一致。
Frightened by the loud noise, the dog hid under the bed.
被巨大的噪音吓坏了，那只狗躲到了床底下。
EN： The verb 'tell' is a ditransitive verb, but here it is used with a direct object ('our teacher') representing the person told, which is common when the information shared is implied or has been previously mentioned.
中文： 动词 'tell'（告诉）是双宾动词，但在这里它仅接了一个直接宾语（'our teacher'，指被告知的人），这在所分享的信息已被暗示或先前已提及的情况下非常常见。
She smiled and told her mother.
她微笑着并告诉了她的母亲。
EN： Participle Clauses (分詞子句): A past participle clause (e.g., 'Cooled down') can be used to express a condition, cause, or time relation. It is a shortened form of a passive adverbial clause (e.g., 'When it was cooled down'). The implied subject of the participle clause must be the same as the subject of the main clause ('the gas').
中文： 过去分词从句（Participle Clauses）可用于表示条件、原因或时间关系。它是被动语态状语从句的简化形式（例如“当它被冷却后”）。分词从句的隐含主语必须与主要从句的主语（在此为 'the gas'）一致。
Left in the sun, the ice melted quickly.
留在阳光下，冰块很快就融化了。
EN： Phrasal Verb 'turn into' (動詞片語 'turn into'): This phrasal verb means to change or become something else. It is followed by a noun representing the result of the transformation.
中文： 动词短语“turn into”意为“变成”或“转化为”另一种事物。其后接表示转变结果的名词。
With enough heat, water turns into steam.
有足够的热量，水就会变成蒸汽。
EN： Participle clauses (specifically using the present participle '-ing') can be used to express the method, reason, or time of the main action. Here, 'Working together' functions as an adverbial clause of manner or means, showing how the main action was accomplished. It shares the same subject ('we') as the main clause.
中文： 分词从句（特别是使用现在分词“-ing”）可用于表示主句动作的方法、原因或时间。在此处，“Working together”作为方式或手段的状语从句，说明了主句动作是如何完成的。它与主句共享相同的主语（we）。
Using a map, we found the hidden cabin.
通过使用地图，我们找到了那间隐秘的小木屋。
EN： The Simple Past Tense is used to describe completed actions in the past. In this sentence, 'finished' indicates that the action of completing the report occurred and was completed at a specific time in the past.
中文： 一般过去时用于描述过去已完成的动作。在此句子中，“finished”表示完成报告的动作发生在过去的特定时间，且已经结束。
They completed the project yesterday.
他们昨天完成了这个项目。
EN： In professional and academic settings in English-speaking cultures, emphasizing collaboration ('working together') is highly valued. Using active verbs to describe group achievements (like 'we finished') rather than passive structures is preferred to show ownership and teamwork.
中文： 在英語系國家的職場與學術文化中，非常強調團隊協作（working together）。相較於被動句型，人們更傾向使用主動動詞來描述團隊成就（例如「we finished」），以展現團隊的向心力與主動性。
EN： Present Participle Clause (Participle Construction): Used to express two actions happening at the same time or in quick succession, where the subject of both actions is the same. 'Entering the lab' is shortened from 'When I entered the lab'.
中文： 现在分词引导的修饰从句（分词构句）：用于表示两个同时发生或接连发生的动作，且两个动作的主语必须相同。“Entering the lab”是由“When I entered the lab”简化而来。
Walking down the street, I ran into an old friend.
走在街上时，我偶遇了一位老朋友。
EN： Adjective Phrase 'ready for': Used to describe a state of preparedness for a noun or activity. It often follows linking verbs like 'feel' or 'be'.
中文： 形容词短语“ready for”（为……做好准备）：用于描述对某个名词或活动已做好准备的状态。通常接在系动词（如 feel 或 be）之后。
The team felt ready for the upcoming challenge.
团队感觉已经为即将到来的挑战做好了准备。
EN： A participle clause (using a present participle '-ing') can be used to describe an action that happens at the same time as, or immediately before, the action in the main clause. The subject of both clauses must be the same (in this case, 'I').
中文： 分词从句（使用现在分词“-ing”）可用于描述与主句动作同时发生或紧接在主句动作之前发生的行为。两个从句的主语必须相同（在此句中为“I”）。
Opening the door, she welcomed the guests with a warm smile.
打开门，她带着温暖的微笑迎接客人。
EN： The prepositional phrase 'with care' functions as an adverbial of manner, meaning 'carefully'. It is used to describe how an action is performed.
中文： 介词短语“with care”作为方式状语使用，意思是“小心翼翼地、仔细地”，用来修饰动作进行的方式。
Please handle this fragile box with care.
请小心搬运这个易碎的箱子。
EN： In science education and professional laboratory settings in English-speaking countries, safety protocols (like wearing goggles and gloves) are highly emphasized and strictly enforced. Describing these preparation steps is a standard part of writing lab reports and explaining scientific procedures.
中文： 在英語系國家的科學教育和專業實驗室環境中，安全規範（如佩戴護目鏡和手套）受到高度重視並被嚴格執行。描述這些準備步驟是撰寫實驗報告和解釋科學步驟時的標準流程。
EN： Participle Clauses for Simultaneous Actions: A present participle phrase (Verb-ing) can be used to describe an action that happens at the same time as the action in the main clause. The subject of both actions must be the same (in this case, 'I'). It functions as a shortened adverbial clause (e.g., 'While I was mixing...').
中文： 分词从句表示同时发生的动作：现在分词短语（动词-ing）可用于描述与主句动作同时发生的行为。两个动作的主语必须相同（在此句中为“我”）。它起到了简化状语从句的作用（例如：“当我在混合时...”）。
Walking down the street, I met an old friend.
走在街上时，我遇到了一位老朋友。
EN： Watch for: This phrasal verb means to pay attention to one's surroundings in order to notice a particular thing or event. It is often followed by a noun phrase indicating what you are expecting to see or happen.
中文： 动词短语 'watch for'（密切注意/寻找）：这个短语意为密切注意周围环境，以便察觉特定事物或事件的发生。后面通常接名词短语，表示预期会看到或发生的事情。
We stood by the window, watching for the postman to arrive.
我们站在窗边，留意着邮差的到来。
EN： Participle Clauses (分詞子句): Used to reduce an adverbial clause when the subject of both clauses is the same. Here, 'Surprised by...' is a past participle clause functioning as 'Because I was surprised by...'. The past participle ('surprised') is used because the subject ('I') receives the action or is in that state.
中文： 分词从句：当主句和从句的主语相同时，可用于简化状语从句。在此处，「Surprised by...」是一个过去分词从句，相当于「Because I was surprised by...」（因为我被...吓了一跳）。使用过去分词（surprised）是因为主语（I）是该状态的接受者。
Exhausted by the long walk, she fell asleep immediately.
因长途跋涉而疲惫不堪，她立刻睡着了。
EN： Phrasal Verb 'write down' (動詞片語 'write down'): A transitive phrasal verb meaning to record something on paper. When the object is a pronoun (like 'it'), it must be placed between the verb ('write') and the particle ('down').
中文： 动词短语「write down」：及物动词短语，意为在纸上记录某事。当宾语是代词（如「it」）时，必须放在动词（write）和副词小品词（down）之间。
If you hear a good idea, please write it down.
如果你听到一个好主意，请把它写下来。
EN： Participle Clause (Past Participle): The sentence starts with a past participle clause ('Heated gently') which functions as an adverbial clause of time or condition. It is a shortened form of 'When it was heated gently'. The past participle is used because the subject of the main clause ('the liquid') receives the action of heating (passive voice).
中文： 分词从句（过去分词）：句子开头的过去分词从句（Heated gently）起到了时间或条件状语从句的作用。它是“When it was heated gently”的简化形式。这里使用过去分词，是因为主句的主语（the liquid，液体）是接受“加热”这个动作的对象（被动语态）。
Left in the sun, the ice melted quickly.
被留在阳光下，冰块很快就融化了。
EN： Infinitives as Verb Objects (start + to-infinitive): The verb 'start' can be followed by a to-infinitive ('to bubble and steam') or a gerund ('bubbling and steaming') with little to no change in meaning. Here, 'to bubble' and '(to) steam' are coordinate infinitives sharing the particle 'to'.
中文： 不定式作为动词宾语（start + to-不定式）：动词“start”后面可以接不定式（to bubble and steam）或动名词，意思几乎没有差别。在这里，“to bubble”和“(to) steam”是并列的不定式，共享同一个不定式符号“to”。
She started to read and write at a very young age.
她在很小的时候就开始学习读和写。
EN： In scientific English, passive constructions and participle clauses (like 'Heated gently...') are very common. They help to maintain an objective, impersonal tone by focusing on the process and the materials rather than the person performing the experiment.
中文： 在科學英語中，被動結構和分詞子句（如「Heated gently...」）非常常見。這有助於將焦點放在實驗過程和材料上，而非操作實驗的人，從而保持客觀、中立的語調。
EN： Perfect Participle Clause ('Having + past participle'): Used to show that one action was completed before another action in the main clause. It functions as an adverbial clause of time or reason, sharing the same subject as the main clause.
中文： 完成分词短语（Having + 过去分词）：用于表示一个动作在主句动作之前已经完成。它在句中作时间或原因状语，其逻辑主语与主句主语一致。
Having finished his homework, Leo went out to play basketball.
完成功课后，里欧出去打篮球了。
EN： Simple Past Tense: Used to describe completed actions in the past. Here, 'recorded' indicates a past action that occurred after the observation.
中文： 一般过去时：用于描述过去已经完成的动作。在此处，'recorded' 表示在观察之后发生的过去动作。
We designed a new website last month.
我们上个月设计了一个新网站。
EN： A participle clause (or adverbial participle clause) is used to express reason, time, or condition, sharing the same subject as the main clause. To make a participle clause negative, we place 'not' directly before the participle (present participle 'V-ing' or past participle 'V-ed'). Here, 'Not wanting...' is short for 'Because we did not want...'.
中文： 分词从句（或称状语分词从句）用于表示原因、时间或条件，其主语与主要从句相同。若要将分词从句改为否定，只需将否定词「not」直接放在分词（现在分词 V-ing 或过去分词 V-ed）之前。在此处，「Not wanting...」是「Because we did not want...」的简化表达。
Not knowing the answer, she remained silent.
因为不知道答案，她保持沉默。
EN： The adverb 'twice' means 'two times' and is used to indicate frequency. It is placed after the verb and its object ('repeated the test twice') to show how many times the action was performed.
中文： 副词「twice」意为「两次」，用来表示频率。它通常放在动词及其宾语之后（如「repeated the test twice」），用以说明该动作进行了多少次。
I checked the calculations twice to ensure accuracy.
我把计算结果检查了两次以确保准确性。
EN： Participle clauses (using a present participle like 'Using') can be used to express the method, means, or time of an action. It functions as an adverbial modifier, sharing the same subject as the main clause ('we').
中文： 分词从句（使用现在分词如 'Using'）可用于表示动作的方法、手段或时间。它作为状语性修饰语，与主句共享同一个主语（'we'）。
Using a map, we found the hidden cabin in the woods.
使用地图，我们找到了森林中隐藏的小木屋。
EN： An indirect question (noun clause) introduced by 'how long' functions as the direct object of the verb 'measured'. The word order in the noun clause remains subject + verb ('the reaction took').
中文： 由 'how long' 引导的间接问句（名词从句）作为动词 'measured' 的直接宾语。名词从句中的语序保持“主语 + 动词”（'the reaction took'）。
She asked how long the flight would be.
她问这班航程要花多少时间。
EN： Participle Clause (Past Participle): A past participle clause can be used to express a reason or condition, functioning as an adverbial modifier. It has a passive meaning and shares the same subject as the main clause ('we'). It is a shortened form of 'Because we were encouraged by...'.
中文： 分词从句（过去分词）：过去分词引导的从句可用于表示原因或条件，起状语修饰语的作用。它具有被动意义，且与主句的主语（we）一致。这是“Because we were encouraged by...”的简化形式。
Motivated by his speech, the students started to study harder.
受到他演讲的激励，学生们开始更加努力学习。
EN： Adjective Phrase with Preposition (proud of): The adjective 'proud' is commonly followed by the preposition 'of' to indicate the source or cause of pride.
中文： 形容词搭配介词（proud of）：形容词“proud”（自豪的）后面通常接介词“of”，用来表示感到自豪的来源或原因。
She was proud of her daughter's achievements.
她为女儿的成绩感到自豪。
EN： Participle Clauses (分詞短語): A present participle ('Comparing...') can be used to reduce an adverbial clause (e.g., 'When we compared...') when the subject of both clauses is the same ('we'). This makes the sentence more concise and is common in formal or written English.
中文： 分词短语（Participle Clauses）：当状语从句（例如 'When we compared...'）的主语与主要从句的主语（'we'）相同时，可以使用现在分词（'Comparing...'）来简化从句。这能使句子更为精炼，常用于正式或书面英语中。
Entering the lab, she put on her safety goggles.
进入实验室时，她戴上了安全护目镜。
EN： Adverbial Phrase 'at last' (副詞片語 'at last'): This phrase is used to emphasize that something has happened after a long time, difficulty, or delay. It is synonymous with 'finally' or 'in the end'.
中文： 副词短语 'at last'（终于）：此短语用于强调某事在经历了很长时间、困难或延迟之后终于发生，与 'finally' 或 'in the end' 同义。
After hours of searching, we found the missing key at last.
经过几个小时的寻找，我们终于找到了遗失的钥匙。
EN： Present Participle Phrase (分詞短語): The sentence starts with 'Working as a team', which is a present participle phrase acting as an adverbial modifier. It shares the same subject ('we') as the main clause and describes the circumstances or manner in which the main action occurred.
中文： 现在分词短语（Present Participle Phrase）：句子开头的“Working as a team”是一个现在分词短语，用作状语修饰语。它的逻辑主语与主句的主语（we）一致，用来描述主句动作发生的背景或方式。
Studying late into the night, she finally finished the project.
读书读到深夜，她终于完成了这个项目。
EN： Turn A into B (將 A 轉化為 B): This phrasal verb pattern means to transform or change something from one state, form, or substance into another.
中文： Turn A into B（将 A 转化为 B）：此短语动词句型表示将某物从一种状态、形式或物质转变或转化为另一种。
They turned the old warehouse into a modern art gallery.
他们将旧仓库改造成了现代艺术画廊。
EN： In Western scientific and educational contexts, there is a strong cultural emphasis on collaboration and 'teamwork' rather than just individual achievement. The phrase 'turned curiosity into discovery' also reflects the value placed on inquiry-based learning, where asking questions (curiosity) is seen as the essential starting point for real scientific progress.
中文： 在西方科學與教育背景中，文化上非常強調合作與「團隊精神」（teamwork），而非僅僅個人成就。此外，「將好奇心轉化為發現」這句話也反映了對「探究式學習」的重視——在這種學習模式中，提出問題（好奇心）被視為科學進步不可或缺的起點。
EN： The participle phrase 'Looking back' functions as an adverbial modifier, expressing a perspective or condition. It is a shortened form of 'When I look back'.
中文： 分词短语“Looking back”（回想起来）在此作为状语修饰语，用来表示视角或条件。它是“When I look back”的简化形式。
Looking back, I realize how much I have grown.
回想起来，我才意识到自己成长了多少。
EN： The causative verb 'make' is followed by an object and a bare infinitive (verb in base form) to express causing something to happen or change state. In 'make science come alive', 'come' is the bare infinitive.
中文： 使役动词“make”后面接受词和原形动词（不带 to 的不定式），用来表示使某事发生或改变状态。在“make science come alive”中，“come”即为原形动词。
The funny movie made everyone laugh.
这部好笑的电影让每个人都笑了。
EN： The idiom 'come alive' is commonly used in English to describe a subject or activity becoming exciting, interesting, or highly active, rather than boring or theoretical. It highlights the transformative power of good teaching.
中文： 片語「come alive」在英文中常用來形容某個學科或活動變得生動有趣、充滿活力，而非枯燥乏味或流於理論。這句話強調了好的教學方法所帶來的啟發與轉變力量。
EN： Wh-questions in the simple past tense use the auxiliary verb 'did' followed by the subject and the base form of the main verb (infinitive without 'to'). The structure is: Wh-word + did + subject + base verb.
中文： 一般过去时的 Wh- 疑问句使用助动词“did”，后接主语与主要动词的原形（不带 to 的不定式）。其结构为：Wh- 疑问词 + did + 主语 + 原形动词。
How did you find the answer?
你是怎么找到答案的？
EN： Vocative comma: When addressing a person directly by name (Emma) at the end of a sentence, a comma must be placed immediately before the name to set it off from the rest of the sentence.
中文： 呼格逗号：在句子末尾直接称呼某人的名字（如 艾玛）时，必须在名字前加上逗号，以将其与句子的其余部分隔开。
Where are you going, Tom?
你要去哪里，汤姆？
EN： In English-speaking academic and professional environments, colleagues and students often address each other directly by their first names (like 'Emma') to foster a friendly, collaborative, and egalitarian atmosphere.
中文： 在英語系的學術與專業環境中，同事和學生之間經常直接稱呼彼此的名字（如「艾瑪」），以營造友善、合作且平等的氛圍。
EN： Present Participle Clauses (Participle Phrases) are used to reduce adverbial clauses when the subject of both clauses is the same. 'Putting on...' is a shortened form of 'After I put on...' or 'While I was putting on...'. It describes an action that happens just before or at the same time as the main action.
中文： 现在分词引导的状语从句（分词短语）用于在前后的主语相同时简化句子。「Putting on...」是「After I put on...」（当我戴上...之后）或「While I was putting on...」的简化形式，用来描述在主句动作之前或同时发生的动作。
Opening the drawer, he took out a notebook.
打开抽屉后，他拿出一本笔记本。
EN： The phrasal verb 'put on' means to dress oneself in something or to place something on one's body (like gloves, clothes, or glasses). It is a separable phrasal verb, meaning the object can go between 'put' and 'on' if it is not a pronoun, though it commonly stays after 'on'.
中文： 短语动词「put on」意为穿戴上某物（如手套、衣服或眼镜）。这是一个可拆分的短语动词，这意味着如果宾语不是代词，它可以放在「put」和「on」之间，不过通常会放在「on」的后面。
She put on her coat before going outside.
她出门前穿上了大衣。
EN： In chemistry and biology laboratory settings, safety protocols are strictly emphasized. 'Putting on gloves' is the standard first step of personal protective equipment (PPE) before handling any chemical or biological 'samples' to prevent contamination and ensure safety.
中文： 在化學和生物實驗室環境中，安全規範受到嚴格強調。在接觸任何化學或生物「樣品」（samples）之前，「戴上手套」（putting on gloves）是穿戴個人防護裝備（PPE）的標準第一步，以防止污染並確保安全。
EN： Participle Clauses (Present Participle): A present participle clause (Verb-ing) can be used to describe two actions happening at the same time, or one action happening immediately after another, when both actions share the same subject. Here, 'Mixing the liquids' is short for 'When I was mixing the liquids'.
中文： 分词从句（现在分词）：当两个动作由同一个主语发出，且同时发生或接连发生时，可以使用现在分词（Verb-ing）引导的从句来简化句子。在此处，“Mixing the liquids”是“When I was mixing the liquids”（当我在混合这些液体时）的简化表达。
Walking down the street, I met an old friend.
走在街上时，我遇到了一位老朋友。
EN： Sensory Verbs: Verbs of perception (like 'see', 'hear', 'watch', 'notice') can be followed by an object and a bare infinitive (verb root) or a present participle (verb-ing). In this sentence, 'saw' is followed by the object 'small bubbles' and the bare infinitive 'form' is implied or omitted, focusing on the completed observation of the bubbles.
中文： 感官动词：表示感官知觉的动词（如 see、hear、watch、notice）后面可以接受词，再接原形动词（表示完整过程）或现在分词（表示正在进行的动作）。在本句中，“saw”后面接了宾语“small bubbles”（小气泡）。
I saw the birds fly away.
我看到鸟儿飞走了。
EN： This sentence uses a Participle Clause (specifically a past participle clause) to express a reason or cause. 'Surprised by the smell' is a shortened version of 'Because I was surprised by the smell'. The subject of the participle clause must be the same as the subject of the main clause ('I').
中文： 本句使用了分词从句（特别是过去分词从句）来表示原因或理由。“Surprised by the smell”是“Because I was surprised by the smell”的简化版。分词从句的主语必须与主要从句的主语（此处为“I”）一致。
Exhausted by the long walk, she fell asleep immediately.
因为长途步行而疲惫不堪，她立刻睡着了。
EN： The phrasal verb 'step back' means to move backward, away from something. The adverb 'quickly' modifies the verb 'stepped' to describe the speed of the action.
中文： 短语动词“step back”意为“往后退”，即避开某物。副词“quickly”（迅速地）修饰动词“stepped”，用以描述该动作的速度。
He stepped back to let the ambulance pass.
他往后退了一步，好让救护车通过。
EN： The Perfect Participle ('Having' + past participle) is used to indicate that the action in the participle clause was completed before the action in the main clause. It functions as an adverbial clause of time or reason, sharing the same subject as the main clause.
中文： 完成分词（Having + 过去分词）用于表示分词从句中的动作在主句动作之前已经完成。它在句中作时间或原因的状语从句，且其逻辑主语与主句的主语一致。
Having finished his homework, Leo went to bed.
写完作业后，里奥就去睡觉了。
EN： The simple past tense ('began') is used to describe a completed action that occurred at a specific time in the past.
中文： 一般过去时（例如 'began'）用于描述在过去特定时间点已经完成的动作。
We began the meeting at nine o'clock.
我们在九点钟开始了会议。
EN： This sentence begins with a present participle phrase ('Watching closely'), which functions as a participle clause. It expresses an action happening at the same time as the main verb ('recorded'). The implied subject of the participle is the same as the subject of the main clause ('we').
中文： 本句以现在分词短语（Watching closely）开头，作为分词构句使用。它表示与主句动词（recorded）同时发生的动作。分词短语的隐含主语与主句的主语（we）相同。
Walking down the street, I ran into an old friend.
走在街上时，我偶遇了一位老朋友。
EN： The determiner 'each' is used before a singular countable noun ('change') to refer to all members of a group, considering them individually.
中文： 限定词“each”用于单数可数名词（change）之前，用来指代群体中的每一个成员，并强调个体性。
Each student received a certificate.
每位学生都获得了一张证书。
EN： In scientific contexts and academic writing, precision and objective observation are highly valued. Using participle clauses like 'Watching closely' allows the writer to connect actions logically and concisely, which is a common stylistic feature in lab reports and scientific descriptions.
中文： 在科學情境與學術寫作中，非常看重精準度與客觀觀察。使用如「Watching closely」的分詞構句，能讓寫作者簡潔且具邏輯性地連結多個動作，這是實驗報告和科學描述中非常常見的文體特色。
EN： This sentence uses a participle clause (specifically a present participle clause: 'Not knowing the answer') to express a reason. It is a shortened form of 'Because we did not know the answer'. To form a negative participle clause, place 'not' directly before the participle.
中文： 本句使用了分词从句（特别是现在分词从句：'Not knowing the answer'）来表示原因。这是 'Because we did not know the answer' 的简化形式。要形成否定分词从句，只需将 'not' 直接放在分词前面。
Not having enough money, he decided to stay at home.
因为没有足够的钱，他决定留在家里。
EN： The main clause uses the simple past tense ('asked') to describe a completed action in the past. The subject of both the participle clause and the main clause must be the same ('we').
中文： 主句使用一般过去时（'asked'）来描述过去已完成的动作。分词从句与主句的主语必须一致（皆为 'we'）。
Feeling tired, she went to bed early.
因为觉得累了，她很早就上床睡觉了。
EN： Participle clauses (using a present participle like 'Using') are used to express method, time, or reason. They share the same subject as the main clause (in this case, 'we').
中文： 分词从句（使用现在分词如 'Using'）用于表示方法、时间或原因。分词动作的主动执行者与主句的主语一致（在此句中为 'we'）。
Using a map, they found the hidden cabin.
利用地图，他们找到了那间隐秘的木屋。
EN： The simple past tense ('made') is used to describe completed actions in the past.
中文： 一般过去时（'made'）用于描述过去已经完成的动作或状态。
She made a delicious cake for the party.
她为派对做了一个美味的蛋糕。
EN： This sentence uses a present participle phrase ('Working together') acting as an adverbial clause of manner or means. It describes how the main action ('solved') was accomplished. The implied subject of the participle is the same as the subject of the main clause ('we').
中文： 本句使用了现在分词短语（'Working together'）作为修饰状语从句，用来表示达到主要动作（'solved'）的方式或手段。分词的隐含主语与主句的主语（'we'）一致。
Using a map, we found the hidden cabin.
通过使用地图，我们找到了那间隐秘的小木屋。
EN： The simple past tense ('solved') is used to describe a completed action that occurred at a specific time in the past.
中文： 一般过去时（'solved'）用于描述在过去特定时间点已经完成的动作。
They completed the project yesterday.
他们昨天完成了这个项目。
EN： This sentence uses a Participle Clause (specifically a past participle clause) to express a condition or circumstance. 'Described step by step' is a shortened form of 'When it is described step by step'. The past participle 'Described' is used because the subject 'science' receives the action of being described (passive voice).
中文： 本句使用了分词从句（特别是过去分词从句）来表示条件或情况。“Described step by step”是“When it is described step by step”的简化形式。这里使用过去分词“Described”，是因为主语“science”（科学）与动词“describe”（描述）之间是被动关系（科学被描述）。
Seen from a distance, the island looks like a sleeping giant.
从远处看（被从远处看），这座岛屿看起来就像一个沉睡的巨人。
EN： The verb 'feel' is used here as a linking verb (copular verb) meaning 'to seem' or 'to produce a particular sensation'. It is followed directly by an adjective ('clear') acting as a subject complement, rather than an adverb.
中文： 动词「feel」在此处用作系动词（感官动词），意思是「听起来、感觉起来」或「给人某种感觉」。其后直接接形容词「clear」（清晰的）作为主语补足语，而非接副词。
After a long day of work, the bed feels comfortable.
工作了一整天后，床铺感觉很舒服。
重要单词附有 IPA 发音、定义、例句和互动式测验。
在本文中： 显微镜，一种用于放大微小物体以供观察的实验室仪器
在本文中： 化学反应，指物质间发生化学变化并产生新物质的过程
在本文中： 护目镜，用于保护眼睛免受化学品、飞溅物等伤害的防护眼镜
在本文中： 观察，仔细察看并记录事物的变化
在本文中： 好奇心，求知欲
在本文中： 样品、标本，用于检测或实验的少量物质
在本文中： 避免，防止（错误或不好的事情发生）
在本文中： 轻柔地、缓慢地，指加热时火力温和
片语包含类型标示、双语定义、用法说明和例句。
To become interesting, exciting, or full of energy
变得生动、活泼或有趣
To move backward away from something, especially out of surprise or to avoid danger
退后、往后退
Progressing gradually from one stage to the next in a sequence
一步一步地、循序渐进地
A visible alteration in color, often indicating a chemical reaction has occurred
颜色变化（呈色反应）