沉住气，别慌！

Keep calm! Don't panic!

事到临头，要沉住气。

Now that the situation becomes critical, one must keep calm.

沉住气，比尔，我们好好想一想。

Just hold your horses, Bill. Let's think about this for a moment.

察言观色沉住气，没看明白深呼吸。

Keep calm, not understand extensive deep breaths.

她说，“我仍然记得其中一个合伙人把我拉到一边说：你知道，成为暑期助理固然很好，但是要沉住气。”

She says, "I still remember one of the partners taking me aside and saying, 'You know, being a summer associate is all well and good, but take a deep breath."