vt.

1. 扮演
   He acted Othello at the Royal Theater that evening.

   那天晚上他在皇家剧院扮演奥赛罗。

2. 装出；举动像
   He acted the wise man who knew everything and never made mistakes.

   他假装成是无所不知，从不出错的聪明人。

vi.

1. 行动[（+on/for）]
   We should act immediately.

   我们应该立即行动。

2. 起作用，见效[（+on/upon）]
3. 假装；演戏，表演
   The actress acts very well.

   这位女演员的表演非常出色。

4. 扮演，充当[（+as）]
   John acted as chairman in his absence.

   他不在时，约翰充当主席。

5. 举止，表现[L]
   I don't think she acted right.

   我认为她做得欠妥。

n.[C]

1. 行为；行动
   get one's act together

   【俚】冷静下来仔细筹划（吸食迷幻药，迷惘失向后重新振作）

   My first act was to run into the bedroom.

   我做的第一件事便是跑进卧室。

2. 【戏】（常大写）幕；节目
   She was magnificent in Act One of "Carmen".

   她在《卡门》的第一幕中演得好极了。

3. （常大写）法案，法令
   Would you tell us something about the new Education Act?

   请你给我们讲讲新的教育法好吗？

4. 【口】装腔作势[S1]
   He's just putting on an act.

   他只是装腔作势罢了。

v.

1. take action; do something.
   ▸ (act up) informal behave badly.
2. (act for/on behalf of) represent on a contractual or legal basis.
   ▸ [as adj. acting] temporarily doing the duties of another.
3. take effect or have a particular effect.
4. perform a fictional role in a play or film.
   ▸behave so as to appear to be:

   I acted dumb.
   ▸ (act something out) perform a narrative as if it were a play.

n.

1. a thing done.
2. a simulation or pretence.
   ▸a particular type of behaviour or routine:

   he did his Sir Galahad act.
3. Law  a written ordinance of Parliament, Congress, etc.
4. dated a record of the decisions or proceedings of a committee or an academic body.
5. a main division of a play, ballet, or opera.
6. a set performance:
   her one-woman poetry act.