the call of nature字面意思是“大自然的呼唤”，但其实是“需要上厕所”的委婉表达。

如果有人和你说他要去answer the call of nature，其实就是要去上厕所，可别理解错啦！

e.g. There was no break in the agenda, not even for the call of nature.

日程安排上没有任何休息的空隙，连上厕所的时间都没有。

让我们再来看下call还有哪些常用的短语吧！

call sb. names

辱骂，出口伤人

to call someone by an abusive or insultingname

e.g. John was punished for calling his teacher names.

约翰因为辱骂老师受到了惩罚。

call it a day

到此为止，结束

to quit work and go home; to say that aday’s work has been completed

e.g. I’m tired. Let’s call it a day.

我累了，今天到此为止吧。

call in sick

打电话请病假

to call one’s place of work to say that oneis ill and cannot come to work

e.g. Four of our office staff called in sick today.

我们办公室今天有四个人请病假了。

（来源：沪江英语）