EN： The Simple Past Tense is used to talk about completed actions in the past. Regular verbs end in '-ed' (e.g., 'discovered'), while irregular verbs have unique past forms.
中文： 一般过去时用于描述过去已经完成的动作。规则动词的词尾会加上“-ed”（例如“discovered”），而不规则动词则有其特定的过去式形态。
She found a beautiful shell on the beach yesterday.
她昨天在海滩上发现了一个美丽的贝壳。
EN： Australia is known for its vast coastline and beautiful beaches. Due to its geographic location, space debris occasionally re-enters the atmosphere and lands in remote areas of the country or its surrounding waters, which often sparks local curiosity and scientific investigation.
中文： 澳大利亚以其辽阔的海岸线和美丽的海滩而闻名。由于其地理位置，太空垃圾偶尔会重新进入大气层并降落在该国的偏远地区或周边海域，这往往会引发当地民众的好奇心与科学调查。
EN： We use 'at' for a specific place or point (like a beach name), and 'in' for a larger area, region, or country (like a state or country).
中文： 我们使用“at”来表示特定的地点或位置（例如海滩的名称），而使用“in”来表示较大的区域、范围或国家（例如州或国家）。
We met at Forrest Beach in Queensland.
我们在昆士兰的福雷斯特海滩见面。
EN： Queensland is a state in northeastern Australia known for its tropical climate and beautiful beaches. Forrest Beach is a quiet coastal community in this region.
中文： 昆士兰是澳大利亚东北部的一个州，以其热带气候和美丽的海滩而闻名。福雷斯特海滩是该地区一个安静的沿海社区。
EN： The phrase 'at first' is used to describe the situation or feeling at the very beginning of an event, before things changed.
中文： 短语“at first”用来描述事件刚开始时的状况或感受，通常在情况发生改变之前使用，中文常译为“起初”或“刚开始时”。
At first, the English lesson was difficult, but now it is easy.
起初，英语课很难，但现在变简单了。
EN： The verb 'look' is a linking verb used to describe appearance. It is followed directly by adjectives (like 'mysterious' and 'dangerous') to describe the subject, not adverbs.
中文： 动词“look”是连系动词，用来描述外观。后面直接接形容词（如“mysterious”和“dangerous”）来修饰主语，而不是接副词。
The cake looks delicious.
这蛋糕看起来很好吃。
EN： We use the past tense verb 'came' (from 'come') to talk about actions that happened and finished in the past.
中文： 我们使用过去式动词“came”（源自“come”）来描述在过去发生且已结束的动作。
He came to my house yesterday.
他昨天来我家了。
EN： We use 'to + verb' (infinitive) to show the purpose or reason why someone does an action. It answers the question 'Why?'.
中文： 我们使用“to + 动词原形”（不定式）来表示某人做某个动作的目的或原因。它回答了“为什么”的问题。
He went to the kitchen to make some tea.
他去厨房泡茶。
EN： The verb 'put' is used in the past tense here (it has the same form in present and past). The pattern 'put + [something] + [location]' is used to show moving something to a specific place.
中文： 动词“put”在此处为过去式（其现在式与过去式拼写相同）。“put + [某物] + [位置]”的句型用来表示将某物放置到特定的地方。
She put the book on the table.
她把书放在桌子上。
EN： We use 'could not' (or 'couldn't') to talk about something that was not possible in the past. It is the past tense of 'cannot'. After 'could not', we always use the base form of the verb (like 'go').
中文： 我们使用“could not”（或“couldn't”）来表示过去无法做到或不可能做到的一件事。它是“cannot”的过去式。在“could not”之后，我们必须使用动词原形（例如“go”）。
We could not find our keys yesterday.
我们昨天找不到我们的钥匙。
EN： The simple past tense is used to talk about things that happened and finished in the past. For regular verbs, we add '-ed', but 'find' is an irregular verb, so its past tense form is 'found'.
中文： 简单过去时用来描述在过去发生且已经结束的事情。规则动词会加上“-ed”，但“find”是不规则动词，所以它的过去式形式是“found”。
She found her keys under the sofa.
她在沙发下找到了她的钥匙。
EN： The Australian Space Agency is a relatively young government agency, established in 2018. It is responsible for developing Australia's space industry and coordinating space-related activities.
中文： 澳大利亚航天局是一个相对年轻的政府机构，成立于2018年。它负责发展澳大利亚的航天产业并协调与航天相关的活动。
EN： We use 'were' as the past tense of 'are' when talking about plural subjects (more than one thing) in the past.
中文： 当我们在描述过去的事情，且主语是复数（不止一个事物）时，我们会使用“were”作为“are”的过去式。
The old toys were in the box.
那些旧玩具以前在盒子里面。
EN： The passive voice 'are called' is used to show what name or term is given to something. It is formed with 'be' verb + past participle (called).
中文： 被动语态“are called”（被称为）用来表示某物被赋予的名称或称呼。它的结构是“be 动词 + 过去分词 (called)”。
These animals are called pandas.
这些动物被称为熊猫。
EN： The term 'space balls' is an informal, colloquial way to describe spherical space debris (specifically pressure vessels). While 'pressure vessels' is the technical scientific term, the media and experts often use fun, simplified terms like 'space balls' to make science more accessible to the general public.
中文： "space balls"（太空球）是一个用来形容球形太空垃圾（特别是压力容器）的非正式口语化说法。虽然 "pressure vessels"（压力容器）是专业的科学术语，但媒体和专家经常会使用像 "space balls" 这样有趣且简化的词汇，好让一般大众更容易理解科学内容。
EN： The past simple tense is used to describe completed actions in the past. For regular verbs, we add '-ed' (land -> landed). For irregular verbs, the form changes (fall -> fell). When connecting two past actions with 'and', we use the past tense for both verbs.
中文： 过去简单时用于描述过去已经完成的动作。规则动词词尾加 "-ed"（如 land 变成 landed），不规则动词则有其特定变化（如 fall 变成 fell）。当用 "and" 连接两个过去的动作时，两个动词都要使用过去式。
The bird flew from the tree and landed on my hand.
那只鸟从树上飞下来，落在我的手上。
EN： Using 'said' to report what someone else said (reported speech). We often put a small sentence after 'said' to show the message, and the word 'that' can be left out.
中文： 使用“said”来转述他人说过的话（间接引语）。我们通常会在“said”后面接一个简单的句子来表达信息，而连接词“that”可以省略。
He said the water is cold.
他说水很冷。
EN： In English news writing, it is common to introduce a person's title or expertise (e.g., 'A space expert') before their actual name ('Professor Alice Gorman') to establish their authority immediately.
中文： 在英文新闻写作中，通常会在人名（如“爱丽丝·戈尔曼教授”）之前先介绍其头衔或专业领域（如“一位太空专家”），以立即建立其权威性。
EN： The verb 'call' can be used with the pattern 'call + object + noun' to give someone or something a name or nickname.
中文： 动词“call”可以用“call + 宾语 + 名词”的句型，表示将某人或某物称呼为、命名为某个名字或绰号。
They call him the king.
他们称他为国王。
EN： The term 'space balls' is a playful, informal way to describe spherical space debris (pressure vessels). In popular culture, 'Spaceballs' is also the title of a famous 1987 science fiction parody film.
中文： “space balls”（太空球）是一个幽默且非正式的词汇，用来形容球状的太空垃圾（压力容器）。在流行文化中，《Spaceballs》也是 1987 年一部著名科幻恶搞电影的片名。
EN： The verb 'give' (past tense 'gave') is used here with two objects: the indirect object (implied audience) and the direct object ('important safety advice'). In English, 'advice' is an uncountable noun, so we do not use 'an' before it.
中文： 动词“give”（过去式为“gave”）在此处接一个直接宾语“important safety advice”（重要的安全建议）。在英文中，“advice”（建议）是不可数名词，因此前面不能加冠词“an”。
She gave helpful advice to the students.
她给了学生们有用的建议。
EN： In English-speaking countries, government agencies (like the Australian Space Agency) frequently issue 'safety advice' or 'safety advisories' to the public during unusual events to ensure public safety and prevent panic.
中文： 在英语系国家，政府机构（如澳大利亚航天局）在发生不寻常事件时，经常会向大众发布“安全建议”（safety advice）或“安全公告”（safety advisories），以确保公众安全并防止恐慌。
EN： The modal verb 'should' is used to give advice or say what is the right thing to do. Adding 'never' after 'should' creates a strong negative recommendation, meaning 'it is a very bad idea to do this'.
中文： 情态动词“should”（应该）用来给予建议或表达该做的事。在“should”后面加上“never”（从不、绝不）可以形成强烈的否定建议，表示“绝对不应该做这件事”。
You should never eat green potatoes.
你绝对不应该吃发绿的土豆。
EN： With the increase in space exploration, 'space debris' (or space junk) has become a real-world safety topic. Space agencies around the world, like the Australian Space Agency, advise the public not to touch any fallen objects because they might contain toxic fuels or sharp edges.
中文： 随着太空探索的增加，“space debris”（太空垃圾）已成为现实中的安全问题。世界各地航天机构（如澳大利亚航天局）都建议公众不要触摸任何掉落的太空物体，因为它们可能含有有毒燃料或有锋利的边缘。
EN： Using 'if' to talk about a possible future action and its result. In this pattern, we use 'if' followed by the present simple tense, and the other part of the sentence uses a modal verb like 'should' to give advice.
中文： 使用“if”（如果）来描述一个可能发生的情况及其建议采取的行动。在此句型中，“if”引导的从句使用一般现在时，而另一个从句则使用助动词“should”（应该）来给予建议。
You should ask the teacher if you do not understand.
如果你不懂，你应该问老师。
EN： In many English-speaking countries, 'emergency services' refers to the police, fire department, and ambulance services. The general emergency number is 911 in the US, 999 in the UK, and 000 in Australia.
中文： 在许多英语系国家，“emergency services”（紧急服务）指的是警察、消防队和救护车服务。美国的通用紧急求助电话是 911，英国是 999，而澳大利亚则是 000。
重要单词附有 IPA 发音、定义、例句和互动式测验。
在本文中： 发现（过去式）
在本文中： 球体（复数）
在本文中： 神秘的
在本文中： 危险的
在本文中： （政府或机构的）部门、局、处
在本文中： 安全、防护
在本文中： 局、署、代理机构
在本文中： 专家
在本文中： 建议、忠告
在本文中： 紧急状况、突发事件
片语包含类型标示、双语定义、用法说明和例句。
An organization of people whose job is to put out fires and help in other emergencies.
消防局、消防部门
A container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.
压力容器
Defunct human-made objects in space, such as old satellites and spent rocket stages.
太空垃圾、太空碎片
The public organizations that respond to emergencies, typically including police, fire, and ambulance services.
紧急救援服务（如警察、消防、救护车等）