There will be an interval of 20 minutes after the second act.

第二幕结束后将休息20分钟。

《牛津词典》

She doesn't go on until the second act.

她在第二幕时才上场。

《新英汉大辞典》

In the second act of the play the plot thickens.

剧情在第二场开始变得复杂起来。

youdao

And the creation of woman, as I said, is in fact the climactic creative act in the second Genesis account.

就像我所说，女人的创造，实际上是第二个创世故事中造物的高潮。

耶鲁公开课 - 旧约导论课程节选

Mitch's "I'm not a boy" in the second act and Blanche's "I want magic!"

WSJ: Review: Andre Previn's 'Streetcar' makes it to NYC

The second act is funnier, but Kevin and Lena are no less noble.

WSJ: Clybourne Park | Minority Report | Theater Review by Terry Teachout

For much of the second act she seemed to float and fly, as if the air was her natural element.

ECONOMIST: Obituary