an act of + noun
act of 后接名词，表示某种具体行为，如 act of kindness（善举）、act of violence（暴力行为）。
Helping the old man was a simple act of kindness.
帮助那位老人是一个简单的善举。
法令；法规；幕；表演者；演员；议案；法案；行动；过程
something that people do; a deed
美国标准化大学入学考试(原称美国大学测试)的一次考试
An instance of a certain standardized college admissions test in the United States, originally called the American College Test.
所做的事；行为。
Something done, a deed.
法律文件,记录委员会、社团或立法机构的讨论结果
a legal document codifying the result of deliberations of a committee or society or legislative body
一次性完成的事,区别于作品。
Something done once and for all, as distinguished from a work.
人们所做的事情或导致发生的事情
something that people do or cause to happen
立法机构制定的法规,即成文法。
A product of a legislative body, a statute.
戏剧、歌剧或芭蕾舞的一个部分
a subdivision of a play or opera or ballet
(美国)立法提案,尚未成为法律的议案。
(In the United States) A legislative proposal, a bill that has not yet become law.
做某事的过程。
The process of doing something.
已完成事项的正式或官方记录。
A formal or official record of something done.
戏剧表演中的一幕。
A division of a theatrical performance.
节目中的表演者。
A performer or performers in a show.
任何有组织的活动。
Any organized activity.
行为的表现。
A display of behaviour.
在某些英国大学中,学位候选人公开答辩的论文,或展示学生能力的论文。
A thesis maintained in public, in some English universities, by a candidate for a degree, or to show the proficiency of a student.
Her quick act of bravery saved the child from drowning.
她勇敢的快速行动救了那个溺水的孩子。
用法提示：此句中 act 为名词，意为‘行为’。
The second act of the play ends with a dramatic monologue.
这出戏的第二幕以一段戏剧性的独白结束。
用法提示：此句中 act 为名词，意为‘（戏剧的）一幕’。
The new education act was passed by Parliament yesterday.
新的教育法案昨天在议会通过了。
用法提示：此句中 act 为名词，意为‘法案’。
act of 后接名词，表示某种具体行为，如 act of kindness（善举）、act of violence（暴力行为）。
Helping the old man was a simple act of kindness.
帮助那位老人是一个简单的善举。
be caught in the act 表示“被当场抓住”，of 后接动名词说明当时正在做什么。
The thief was caught in the act of stealing.
那个小偷在行窃时被当场抓住。
the act of 后接动名词，强调“做某事”这一行为本身。
The act of speaking in public makes her nervous.
当众讲话这一行为让她紧张。
grammar · medium
易错句子It was act of great courage.
正确表达It was an act of great courage.
act 是可数名词，单数形式前必须加冠词。汉语没有冠词，学习者常直接省略；act 以元音音素 /æ/ 开头，所以用 an 而不是 a。
grammar · medium
易错句子The government must take act to reduce pollution.
正确表达The government must take action to reduce pollution.
汉语“采取行动”是固定搭配，英语对应的是 take action，这里的 action 不可换成 act。act 作名词指“一次具体的行为、举动”，而表示“行动、措施”这一整体概念时用 action。
grammar · medium
易错句子The police caught the man in the act of steal a car.
正确表达The police caught the man in the act of stealing a car.
in the act of 是固定结构，意为“正在做某事时”，其中 of 是介词，后面必须接动名词（-ing 形式），不能用动词原形。汉语动词无形态变化，学习者容易直接填原形 steal。
名词，与“行为”相对
善举
She helped the old man cross the street as a simple act of kindness.
她帮老人过马路，只是一个简单的善举。
国会法案
The new environmental law was passed as an act of Congress.
新的环境法作为一项国会法案获得通过。
平衡之举
Being a working mother is a difficult balancing act.
做一个职业母亲是一项艰难的平衡之举。
开场表演
The opening act was a young singer who impressed the audience.
开场表演是一位年轻歌手，给观众留下了深刻印象。
犯罪行为
Stealing is a criminal act that carries serious consequences.
偷窃是一种犯罪行为，会带来严重后果。
戏剧或歌剧中的一幕（act）是整部作品的一个部分。
演出在舞台（stage）上呈现，act是表演的一个单元。
演员（actor）在每一幕（act）中扮演角色。
一场演出（performance）可能由多幕（act）组成。
一幕（act）中可能包含多个场景（scene）。
出毛病；捣乱
My car started acting up again.
我的车又开始出毛病了。
用行动表现（情绪）
He acted out his anger by shouting.
他通过大喊大叫来发泄愤怒。
有条理地安排；振作起来
You need to get your act together if you want to pass the exam.
如果你想通过考试，就得振作起来。
我只需要自然地表演。
This line is from the song 'Act Naturally' performed by The Beatles, which tells the story of someone who becomes a movie star by being themselves.
这句歌词出自披头士乐队的歌曲《Act Naturally》，讲述了一个人只需做自己就能成为电影明星的故事。
Choose the next layer that will help you use act with more confidence.
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天灾
The insurance policy does not cover damage caused by an act of God.
该保单不承保天灾造成的损失。