EN： The adverb 'fundamentally' is used to modify the verb 'changed', indicating that the change was deep and essential. In English, adverbs of manner often appear between the auxiliary verb/subject and the main verb.
中文： 副词「fundamentally」（从根本上）用来修饰动词「changed」，表示这种改变是深层且本质的。在英语中，程度或方式副词常置于主语与主要动词之间。
The new technology fundamentally altered the industry.
这项新技术从根本上改变了该行业。
EN： The phrase 'the way' acts as a noun phrase that can be followed by a relative clause (people... think) to describe how something is done. In this structure, 'how' or 'in which' is often omitted.
中文： 「the way」作为名词短语，后方可接定语从句（people... think）来描述某事进行的方式。在这种结构中，通常会省略关系副词「how」或「in which」。
I like the way she explains complex ideas.
我喜欢她解释复杂概念的方式。
EN： The sentence reflects a global shift in mindset where 'public health' moved from a specialized medical topic to a common concern for every individual, highlighting the interconnectedness of modern society.
中文： 這句話反映了全球思維的轉變：「公共衛生」從一個專業的醫學課題變成了每個普通人共同關心的話題，突顯了現代社會中人與人之間緊密的相互關聯。
EN： The Past Perfect Tense (had + past participle) is used to describe an action that was completed before another point or action in the past. Here, it indicates the state of mind existing before the specific year 2020.
中文： 过去完成时（had + 过去分词）用于描述在过去某个时间点或动作之前已经完成的动作。在此句中，它表示在 2020 年这个特定时间点之前就已经存在的心理状态。
By the time the movie started, we had already finished our popcorn.
在电影开始之前，我们就已经吃完爆米花了。
EN： The idiom 'take something for granted' means to fail to properly appreciate something because it is so common or familiar, or to assume something is true without questioning it.
中文： 成语 'take something for granted' 意为「视某事为理所当然」，指因为某事太常见或太熟悉而未能正确欣赏其价值，或是不假思索地认定某事是真实的。
We often take our health for granted until we get sick.
我们常在生病之前，都把健康视为理所当然。
EN： The sentence reflects a global shift in consciousness. In many Western cultures, prior to COVID-19, wearing masks or extreme hand hygiene was often associated only with medical settings, whereas in some East Asian cultures, it was already more common during flu seasons. The pandemic unified these practices globally.
中文： 這句話反映了全球意識的轉變。在許多西方文化中，在新冠肺炎之前，佩戴口罩或極端的洗手衛生通常僅與醫療場所相關；而在一些東亞文化中，流感季節佩戴口罩已較為普遍。這場疫情使這些做法在全球範圍內得到了統一。
EN： Past Perfect Tense (had + past participle): Used to describe an action that was completed before another action in the past. Here, the virus spreading happened before the enforcement of measures.
中文： 过去完成时 (had + 过去分词)：用于描述在过去某个动作之前就已经完成的动作。在此句中，病毒的扩散发生在强制执行措施之前。
By the time the police arrived, the thief had already escaped.
当警察到达时，小偷已经逃跑了。
EN： Passive Voice (be + past participle): Used when the subject is the receiver of the action. 'Were forced' indicates that the governments and citizens did not choose this, but were compelled by circumstances.
中文： 被动语态 (be动词 + 过去分词)：当主语是动作的接受者时使用。「Were forced」表示政府和公民并非自愿选择，而是受环境所迫。
The flight was cancelled due to the heavy storm.
航班因暴风雨而被取消了。
EN： The phrase 'governments and citizens alike' reflects a collective responsibility often emphasized during global crises, highlighting that the pandemic affected all levels of society regardless of status.
中文： 「governments and citizens alike」這個短語反映了在全球危機期間經常被強調的集體責任，突顯了疫情不分地位地影響了社會的各個層面。
EN： Gerunds as Subjects: A gerund is the '-ing' form of a verb that functions as a noun. In this sentence, three gerund phrases ('Wearing...', 'maintaining...', and 'washing...') act together as a compound subject.
中文： 动名词作主语：动名词是动词的 -ing 形式，其功能等同于名词。在本句中，三个动名词短语（佩戴、保持、洗手）共同构成一个复合主语。
Reading books and practicing speaking are effective ways to learn English.
阅读书籍和练习口语都是学习英语的有效方法。
EN： Parallel Structure: When listing multiple items or actions, they should follow the same grammatical form. Here, all three activities are presented as gerund phrases to maintain balance and clarity.
中文： 平行结构：当列举多个项目或动作时，应使用相同的语法形式。在此句中，三个活动皆以动名词短语呈现，以保持句子的平衡与清晰。
EN： The phrase 'social distance' became a global standard during the COVID-19 pandemic, though the specific distance (e.g., 1.5 meters or 6 feet) varied slightly by country. In many East Asian cultures, mask-wearing was already a common courtesy when sick, which facilitated quicker adoption compared to some Western countries.
中文： 「社交距離」(social distance) 一詞在 COVID-19 疫情期間成為全球標準，儘管各國規定的具體距離（如 1.5 公尺或 6 英尺）略有不同。在許多東亞文化中，生病時佩戴口罩本就是一種常見的禮儀，這使得這些地區比某些西方國家更容易快速適應口罩政策。
EN： The structure 'One of the + superlative adjective + plural noun' is used to identify a specific item from a group of exceptional things. Note that the verb must be singular because the subject is 'One'.
中文： 「One of the + 最高级形容词 + 复数名词」结构用于从一组卓越的事物中识别出特定的一项。请注意，动词必须使用单数，因为主语是「One」（其中之一）。
One of the most talented students in the class was chosen for the award.
班上最有才华的学生之一被选中获奖。
EN： The preposition 'during' is used to indicate that something happened within a specific period of time or throughout the course of an event.
中文： 介词「during」用于表示某事发生在特定时间段内或某个事件的整个过程中。
Many people lost their jobs during the economic crisis.
许多人在经济危机期间失去了工作。
EN： The sentence refers to the unprecedented speed of COVID-19 vaccine development, which typically takes 10-15 years but was achieved in under a year through global cooperation and mRNA technology.
中文： 這句話指的是 COVID-19 疫苗前所未有的研發速度。疫苗研發通常需要 10 到 15 年，但在全球合作和 mRNA 技術的幫助下，在不到一年的時間內就完成了。
EN： Non-defining Relative Clause: This uses 'who' to provide extra information about the subject (Scientists). It is separated by commas and can be removed without changing the core meaning of the sentence.
中文： 非限制性定语从句：使用 'who' 来提供关于主语（科学家）的额外信息。这类从句前后通常带有逗号，若将其删除，句子的核心意义依然完整。
My brother, who lives in New York, is a doctor.
我哥哥（他住在纽约）是一位医生。
EN： Past Perfect Continuous Tense: Formed with 'had been' + present participle (-ing), it describes an action that started in the past and continued up until another point in the past.
中文： 过去完成进行时：由 'had been' 加上现在分词（-ing）构成，用来描述一个在过去某个时间点之前就已经开始，并持续进行到该时间点的动作。
They had been waiting for two hours before the train finally arrived.
在火车终于抵达之前，他们已经等了两个小时。
EN： The phrase 'in record time' is a common idiom used to emphasize that something was completed faster than ever before, highlighting the unprecedented global collaboration during the COVID-19 pandemic.
中文： 短語 'in record time'（創紀錄的時間內）是一個常見的習語，用來強調某事完成的速度比以往任何時候都快，這突顯了 COVID-19 疫情期間前所未有的全球合作。
EN： Past Perfect Tense (had + past participle): Used to describe an action that was completed before a specific point in time or another action in the past. In this sentence, the approval happened before the end of 2020.
中文： 过去完成时 (had + 过去分词)：用于描述在过去某个特定时间点或另一个过去动作之前已经完成的动作。在本句中，疫苗获批发生在 2020 年底之前。
By the time the movie started, we had already finished our popcorn.
电影开始时，我们已经吃完了爆米花。
EN： Prepositional Phrase 'By the end of': This phrase is used to indicate a deadline or a point in time by which something occurs. It is frequently paired with perfect tenses.
中文： 介词短语 'By the end of'：此短语用于表示某事发生的截止日期或时间点。它经常与完成时连用。
She will have completed the report by the end of the week.
她将在周末前完成报告。
EN： The term 'emergency approval' (or Emergency Use Authorization - EUA) became a common phrase during the pandemic. It refers to a regulatory mechanism that allows medical products to be used in a public health crisis before full formal licensure, provided they meet specific safety criteria.
中文： 「緊急批准」（或稱緊急使用授權 - EUA）在疫情期間成為常用詞彙。它指的是一種監管機制，允許醫療產品在獲得正式全面許可前，只要符合特定的安全標準，即可在公共衛生危機中使用。
EN： The conjunction 'Although' is used to introduce a subordinate clause that expresses a contrast or concession. In English, 'although' and 'but' are not used together in the same sentence structure.
中文： 连词「Although」(虽然) 用于引导表达对比或让步的从句。在英语语法中，「although」与「but」(但是) 不能出现在同一个句子中。
Although the weather was cold, they decided to go for a walk.
虽然天气很冷，他们还是决定去散步。
EN： The Past Perfect tense (had + past participle) is used to describe an action that was completed before another action or time in the past. Here, the trials were completed before the concerns were fully addressed or before the current point of reference.
中文： 过去完成时 (had + 过去分词) 用于描述在过去某个动作或时间点之前已经完成的动作。在此句中，试验的证明过程发生在人们表达担忧之前或特定的过去参考点之前。
The train had already left when I arrived at the station.
当我到达车站时，火车已经离开了。
EN： In scientific and medical contexts, 'clinical trials' refer to a highly regulated multi-phase process. Mentioning 'extensive clinical trials' is a common way in English-speaking media to reassure the public about the rigor of scientific evidence.
中文： 在科學和醫學語境中，「臨床試驗」(clinical trials) 指的是受高度監管的多階段過程。在英語媒體中，提到「廣泛的臨床試驗」是向大眾保證科學證據嚴謹性的常見方式。
EN： The idiom 'play a role in' (followed by a noun or gerund) is used to describe the contribution or influence someone or something has on a situation. The adjective 'crucial' modifies 'role' to emphasize high importance.
中文： 短语「play a role in」（后接名词或动名词）用于描述某人或某事对情况的贡献或影响。形容词「crucial」（至关重要的）修饰「role」，用以强调其重要程度。
Technology plays a significant role in modern education.
科技在现代教育中发挥着重要的作用。
EN： The preposition 'in' is followed by the gerund 'slowing' (verb+ing). In English, prepositions must be followed by a noun or a gerund when expressing an action.
中文： 介词「in」后面接动名词「slowing」（动词+ing）。在英语中，当介词后要表达一个动作时，必须使用名词或动名词形式。
She is interested in learning new languages.
她对学习新语言感兴趣。
EN： The term 'quarantine' has historical roots in the Italian word 'quaranta' (forty), referring to the 40-day isolation period required for ships arriving in Venice during the Black Death. In the context of COVID-19, it became a globally recognized public health strategy.
中文： 「Quarantine」（隔離）一詞源於義大利語「quaranta」（四十），指黑死病期間抵達威尼斯的船隻需進行為期 40 天的隔離。在 COVID-19 的背景下，這成為了全球公認的公共衛生策略。
EN： Past Perfect Passive (had been + past participle): This structure is used to describe an action that was completed in the passive voice before another point in the past.
中文： 过去完成时的被动语态 (had been + 过去分词)：此结构用于描述在过去某个时间点之前已经完成的被动动作。
The documents had been signed before the meeting started.
文件在会议开始前就已经签署好了。
EN： Relative Clause (who...): A defining relative clause is used here to identify exactly which 'people' the sentence is referring to.
中文： 定语从句 (who...)：这里使用限制性定语从句来明确界定句子中所指的「人们」是哪些人。
Students who finish the test early may leave the room.
提前完成考试的学生可以离开教室。
EN： The term 'designated period' in a public health context often refers to the scientifically determined incubation period of a virus, which was typically 14 days during the early COVID-19 pandemic.
中文： 在公共衛生語境中，「指定期間」(designated period) 通常指科學判定的病毒潛伏期，在 COVID-19 疫情初期，這通常是指 14 天的隔離期。
EN： The conjunction 'While' is used here to introduce a contrast between two ideas, similar to 'although'. It acknowledges one fact while presenting another that might seem contradictory or equally important.
中文： 连词「While」在此处用于引导两个观点之间的对比，类似于「although」（虽然）。它在承认一个事实的同时，提出另一个可能看似矛盾或同样重要的事实。
While the new software is powerful, it is difficult to learn.
虽然这款新软件功能强大，但很难学习。
EN： The preposition 'in' followed by a gerund (verb-ing) is used to indicate the specific area or activity where an action or quality is applicable.
中文： 介词「in」后接动名词（V-ing）用于表示某种动作或特质所适用的特定领域或活动。
She has extensive experience in managing large teams.
她在管理大型团队方面有丰富的经验。
EN： In many Western cultures, the pandemic sparked a significant public discourse on the balance between physical safety (quarantine) and mental well-being, leading to increased awareness and funding for mental health services.
中文： 在許多西方文化中，這場大流行引發了關於身體安全（隔離）與心理健康之間平衡的重大公共討論，進而提高了對心理健康服務的意識和資金投入。
EN： The phrase 'as a result of' is a compound preposition used to introduce the cause or reason for something. It is followed by a noun or noun phrase.
中文： 短语「as a result of」是一个复合介词，用于引出某事的原因或理由。其后接名词或名词短语。
The flight was canceled as a result of heavy snow.
由于大雪，航班被取消了。
EN： The Oxford Comma (or serial comma) is the comma used after the penultimate item in a list of three or more items, before 'and' or 'or'. It helps clarify that the items are separate.
中文： 牛津逗号（或称序列逗号）用于三个或更多项目列表中的倒数第二项之后，即「and」或「or」之前。它有助于明确区分各个项目。
She bought apples, oranges, and bananas.
她买了苹果、橙子和香蕉。
EN： The sentence reflects a global shift in mental health awareness post-COVID-19. In many Western cultures, discussing mental health struggles like 'loneliness' and 'anxiety' has become more normalized and less stigmatized due to the shared experience of the pandemic.
中文： 這句話反映了後疫情時代全球對心理健康意識的轉變。在許多西方文化中，由於大流行的共同經歷，討論「孤獨」和「焦慮」等心理健康困擾已變得更加常態化，且不再那麼被污名化。
EN： The Noun Clause (that-clause) functions as the direct object of the verb 'emphasized'. It reports a fact or a statement that was highlighted.
中文： 名词性从句（that 从句）在此作为动词「emphasized」的直接宾语。它用来陈述被强调的事实或观点。
The teacher emphasized that students must submit their assignments on time.
老师强调学生必须按时交作业。
EN： The Comparative Structure 'more effective than' is used to compare two nouns (prevention and treatment) regarding their quality or impact.
中文： 比较级结构「more effective than」（比...更有效）用于比较两个名词（预防与治疗）在性质或影响上的差异。
Regular exercise is more effective than dieting alone for long-term health.
规律运动对于长期健康而言，比单纯节食更有效。
EN： The phrase 'prevention is better than cure' is a common English proverb. This sentence uses a more formal academic variation ('more effective than treatment') suitable for public health contexts.
中文： 「預防勝於治療」(Prevention is better than cure) 是一句常見的英文諺語。本句使用了更為正式的學術變體（more effective than treatment），適用於公共衛生相關的正式語境。
EN： The use of 'invested heavily in' demonstrates a phrasal verb pattern where 'invest in' is modified by an adverb to show intensity. 'In' is the required preposition to indicate the destination of the investment.
中文： 「invested heavily in」展示了动词短语「invest in」（投资于...）的用法，中间加上副词「heavily」来表示程度剧烈。介词必须使用「in」来连接投资的对象或领域。
The company invested heavily in renewable energy last year.
该公司去年在可再生能源方面投入了大量资金。
EN： The 'to + infinitive' phrase (to protect...) functions as an adverbial of purpose, explaining 'why' the governments took the action described in the main clause.
中文： 「to + 动词原形」短语（to protect...）在此担任目的状语，用来解释政府采取主句动作的「原因」或「目的」。
She studied hard to pass the entrance exam.
她努力学习是为了通过入学考试。
EN： The term 'contact tracing' became a globally recognized public health strategy during COVID-19, though its implementation varied significantly between Western countries (focusing on privacy) and some Asian countries (using more centralized digital data).
中文： 「接觸者追蹤」(contact tracing) 在 COVID-19 期間成為全球公認的公共衛生策略，但各國實施方式不同：西方國家通常較強調隱私，而部分亞洲國家則運用較多中心化的數位數據進行追蹤。
EN： Perfect Participle Phrase: The structure 'having + past participle' is used to indicate that the action in the participle phrase happened before the action of the main verb. It functions as an adverbial modifier explaining the reason or background.
中文： 完成分词短语：使用「having + 过去分词」结构来表示该动作发生在主句动词之前。在此句中作为状语，解释了主语被视为英雄的原因或背景。
Having finished the report, she turned off her computer.
完成报告后，她关掉了电脑。
EN： Passive Voice (Past Tense): The structure 'were + past participle' (were recognized) indicates that the subject receives the action rather than performing it. 'Widely' is an adverb placed between the auxiliary and the main verb for emphasis.
中文： 被动语态（过去时）：结构为「were + 过去分词」（were recognized），表示主语是动作的接受者而非执行者。副词「widely」置于助动词与主动词之间以示强调。
The new policy was widely supported by the local community.
这项新政策受到当地社区的广泛支持。
EN： The term 'front lines' is a military metaphor commonly used in public health to describe healthcare workers who directly interact with patients during an outbreak, emphasizing their bravery and sacrifice.
中文： 「front lines」（前線）原本是軍事術語，在公共衛生領域常用來形容在疫情期間直接接觸病患的醫護人員，強調他們的勇敢與犧牲精神。
EN： The structure 'remind someone of something' is used to cause someone to remember or think about a particular fact or situation.
中文： 结构 'remind someone of something'（提醒某人某事）用于使某人想起或思考某个特定的事实或情况。
The photograph reminded her of her childhood in the countryside.
这张照片让她想起了她在乡下度过的童年。
EN： The gerund 'supporting' acts as the object of the preposition 'of', describing the specific nature of the 'importance'.
中文： 动名词 'supporting' 作为介词 'of' 的宾语，用来描述这个「重要性」的具体内容。
The importance of exercising regularly cannot be overstated.
规律运动的重要性再强调也不为过。
EN： In many Western cultures, the pandemic led to a significant shift in public perception of healthcare workers, moving from seeing them as standard employees to 'frontline heroes.' This sentence reflects that societal shift in gratitude.
中文： 在許多西方文化中，這場大流行導致公眾對醫療工作者的看法發生了重大轉變，從將其視為普通員工轉變為「前線英雄」。這句話反映了社會在感激之情上的這種轉變。
EN： Future Perfect Tense (will have + past participle): This tense is used to describe an action that will be completed by a specific point in the future. In this sentence, it suggests that by a future time, the process of shaping policy will be finished or established.
中文： 将来完成时 (will have + 过去分词)：此时态用于描述在未来某个特定时间点之前将会完成的动作。在本句中，它暗示到未来的某个时刻，塑造政策的过程将已经完成或确立。
By next year, the government will have implemented the new health regulations.
到明年，政府将已经实施了新的卫生法规。
EN： Reduced Relative Clause: The phrase 'learned from the COVID-19 pandemic' is a reduced relative clause modifying 'the lessons'. It is short for 'which were learned'.
中文： 简化定语从句：短语 'learned from the COVID-19 pandemic' 是一个简化定语从句，用来修饰 'the lessons'。它是 'which were learned' 的缩写形式。
The experience gained during the crisis is invaluable.
在危机期间获得的经验是无价的。
EN： The phrase 'for generations to come' is a common idiomatic expression in English used to emphasize the long-term impact of an event or policy, suggesting it will affect children, grandchildren, and beyond.
中文： 短語 'for generations to come' 是英語中常見的慣用語，用來強調某個事件或政策的長期影響，暗示它將影響到子孫後代。
EN： Future Perfect Tense (will have + past participle): This tense is used to describe an action that will be completed before a specific point in time in the future.
中文： 将来完成时 (will have + 过去分词)：此时态用于描述在未来某个特定时间点之前将会完成的动作。
By next month, I will have finished my research project.
到下个月，我将已经完成我的研究计划。
EN： Time Clause with 'By the time': When using 'by the time' to refer to a future event, the verb in the dependent clause is usually in the Present Simple tense, while the main clause uses the Future Perfect.
中文： 由 'By the time' 引导的时间状语从句：当使用 'by the time' 指向未来事件时，从句的动词通常使用一般现在时，而主句则使用将来完成时。
By the time the movie starts, we will have bought our popcorn.
到电影开始时，我们将已经买好爆米花了。
EN： In public health discourse, 'early warning systems' refer to the infrastructure and protocols used to detect disease outbreaks before they become pandemics. The sentence reflects a global shift toward proactive rather than reactive policy.
中文： 在公共衛生論述中，「預警系統」(early warning systems) 指的是在疾病爆發演變成大流行之前，用於偵測疫情的基礎設施和協議。這句話反映了全球政策從「被動反應」轉向「主動預防」的轉變。
EN： Relative Clauses (Adjective Clauses): The word 'that' introduces a defining relative clause 'that experienced the pandemic firsthand' to identify which specific communities are being discussed.
中文： 定语从句（形容词性从句）：单词 'that' 引导限制性定语从句 'that experienced the pandemic firsthand'，用来具体指明是在讨论哪些社区。
Students that study consistently usually achieve better results.
持续学习的学生通常会取得更好的成绩。
EN： Gerunds after Prepositions: The word 'protecting' is a gerund (verb + -ing acting as a noun) because it follows the preposition 'in'.
中文： 介词后的动名词：单词 'protecting' 是一个动名词（动词 + -ing 作为名词使用），因为它接在介词 'in' 之后。
She has a lot of experience in managing large teams.
她在管理大型团队方面有丰富的经验。
EN： The term 'vulnerable populations' in a public health context typically refers to groups at higher risk, such as the elderly, immunocompromised individuals, or those with limited access to healthcare. 'Collective responsibility' reflects a shift from individualistic thinking to community-based action, which was a major theme during the global pandemic response.
中文： 在公共衛生語境中，「vulnerable populations」（弱勢族群）通常指風險較高的群體，如老年人、免疫功能低下者或醫療資源獲取受限的人。「Collective responsibility」（集體責任）反映了從個人主義思維向社區行動的轉變，這是全球大流行應對過程中的一個重要主題。
EN： The sentence uses a 'Noun Clause' (that individual actions... as a whole) acting as the direct object of the verb 'taught'. It explains exactly what was taught.
中文： 本句使用了「名词子句」（that individual actions... as a whole）作为动词「taught」的直接宾语，用来详细说明所教导的内容。
The teacher told us that hard work leads to success.
老师告诉我们，努力会带来成功。
EN： The phrase 'as a whole' is an idiom used after a noun to mean 'considered as a single unit' or 'altogether'.
中文： 「as a whole」是一个惯用语，置于名词之后，表示「作为一个整体」或「总体而言」。
The project was beneficial for the company as a whole.
这个项目对公司整体而言是有益的。
EN： The sentence reflects a shift in Western societies towards 'collective responsibility,' a concept more traditionally associated with East Asian cultures, highlighting how the pandemic bridged some cultural gaps in public health thinking.
中文： 這句話反映了西方社會向「集體責任」觀念的轉變，這在傳統上更多與東亞文化相關，突顯了大流行病如何縮小了公共衛生思維中的文化差異。
重要单词附有 IPA 发音、定义、例句和互动式测验。
在本文中： 从根本上地；彻底地
在本文中： 重要性；意义
在本文中： 突破；重大进展
在本文中： 广泛的；大规模的
在本文中： 隔离（期间）
在本文中： 传播；传染
在本文中： 长期的；持续很久的
在本文中： 基础设施；底层建设
在本文中： 精密的；复杂的；先进的
在本文中： 脆弱的；易受伤害的
片语包含类型标示、双语定义、用法说明和例句。
To fail to properly appreciate something because it is so common or familiar.
视为理所当然
Faster than has ever been done before.
比以往任何时候都要快。
In the most important or dangerous position of an activity or conflict.
在第一线
A situation where all members of a group are responsible for the actions and well-being of the group.
集体责任
To think about or plan for the future.
展望未来
A type of RNA that carries genetic information from DNA to the ribosome, where it serves as a template for protein synthesis.
信使核糖核酸 (mRNA)
Research studies performed in people that are aimed at evaluating a medical, surgical, or behavioral intervention.
临床试验
The process of identifying, assessing, and managing people who have been exposed to a disease to prevent onward transmission.
接触者追踪
Groups of people who are at higher risk for poor health or social outcomes due to various barriers or biological factors.
弱势群体 / 易受伤害群体
The physical space maintained between individuals to prevent the spread of an infectious disease.
社交距离