calm

尽量保持冷静——医生很快就到。

Try to stay ___calm - the doctor will be here soon.

他的举止非常冷静。

He has a very ___calm manner.

那天没有下雨，海面平静。

There was no rain that day and the sea was ___calm.

海面平静，几乎没有波浪，所以我们可以在水中放松。

The sea is ___calm with almost no waves, so we could relax in the water.