calm down

• (使)平静下来；(使)镇定下来：

  Calm down, there's nothing to worry about.

  安静下来吧，没有什么值得焦虑的。

  I'll go and calm your angry brother down.

  我去让你生气的兄弟平静下来。

  He will have calmed down tomorrow morning.

  明天早晨他就会安静下来。