I know it's an unsatisfactory situation here, but you must calm down.

我知道这是个令人不满意的状况，但你必须要保持冷静。

youdao

For example, when I decide to make the instrument, I must calm down to accumulate my energy and prepare well before working on it.

比方说，我决定要雕这件乐器之前，我一定静下来养足精神做好准备工夫。

youdao

When we get angry, we should not think about punishing others, we must calm down and have a talk to others, so that the problem can be fixed, or we will make the unforgettable mistake.

当我们生气，不应该想着惩罚别人，必须要冷静下来，和别人谈一谈，这样问题才能得到解决，不然就会犯下不可原谅的错误。

youdao