He replies, "I act because I must."

他回答说：“我这么做是因为我必须这么做。”

youdao

Sometimes I act as a listening ear for fellow students to talk over what is bothering them.

有时我充当一个倾听者，听我的学生们讨论他们的烦心事。

youdao

He wrote, "My sister says I act like an alien."

他写道：“我妹妹说我的举止像外星人。”

youdao

We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选

The I-Squared Act, the bill with the broadest support in Senate according to PandoDaily, would increase the number of STEM visas from 65, 000 to 115, 000 annually.

FORBES: Steve Case: Crowdfunding Will Augment - Not Replace - Venture Capital

It's a very, very dodgy sort of situation and the Met does - I think - need to clean up its act a little bit.

BBC: Met Police got ?22.7m from sponsors, FOI request finds

Since Congress did not act last year on this proposal, I am introducing it in this year's budget -- and I once again urge Congress to act on it.

WHITEHOUSE: Tax Accountability in Government Contracts