obey a call of nature

• 解手；上厕所

obey a call of nature的用法和样例：

例句

1. I was probably off the road, behind a bush, answering a call of nature.
   那时我可能刚巧离开公路，到树丛后面解手去了。
2. I waked early to answer a call of nature.
   我早起上厕所。
3. Tom left to pay a call.He should be back soon.
   汤姆去上厕所了，一会儿就回来的。