Exp. to be calm and composed

十分冷静，镇定自如

Second, be calm and well prepared.

第二点，做好充分准备，沉着应考。

Treat Japan, I never would be calm!

对待日本，我永远不会心平气和！

In case of danger, you must be calm.

如果遇到危险， 你必须镇定。

Pretending to be calm, self comforting.

故作镇定，自我安慰。

Cathy slowly forced herself to be calm.

Cathy强迫着自己慢慢冷静下来。

Needs to be calm, forbids to float with.

更需要心平气和，禁止浮跟。

Mom has to be calm and cool with this child.

妈妈必须平静冷酷地对待这个孩子。

The situation requires that we should be calm.

形势要求我们保持镇静。

The water inside this man-made harbor would be calm.

人造港内的水比较平静。