He thought she was play-acting but in fact she had really hurt herself.

他以为她是装出来的，但实际上她真的受了伤。

《牛津词典》

An acting company, for example, could change a play if they wanted to.

例如，表演公司可以随心所欲地更改剧本。

youdao

Students play the part of a pig, talking and acting.

学生扮演小猪的角色，边说边做动作。

youdao

Critics have praised the play for its skillful acting and expressive lighting and set design.

VOA: special.2010.03.12

Again, this is just his personal ambivalence about who he was, and his uncertainty about the role that he had in his own family So, this was a play-acting that was part of his life.

这也表明他对自己的身份的矛盾,以及自己在家庭中的角色的不确定,所以,这种角色扮演成为他生活的一部分

耶鲁公开课 - 欧洲文明课程节选

This acting style is quite different from play-acting today.

VOA: special.2010.01.06

Most of what you see and hear from alarmists regarding global warming can be most accurately described as play acting on the meme of settled science.

FORBES: The Disgraceful Episode Of Lysenkoism Brings Us Global Warming Theory

In 2003 she was acting in a play under the direction of her idol Woody Allen when the director suddenly decided he didn't like what he was seeing from Gurwitch.

CNN: Eight successful people grateful they got canned

They recently staged a performance of the Shakespeare's Richard III and are acting scenes from the play as part of their protest.

BBC: The Shakespeare