nature calls
自然的需求（尤指上厕所）
口语·委婉表达上厕所需求
英文释义
to have the urge to use the bathroom
例句
I have to go—nature calls, and I can't hold it much longer.
典故来源
委婉语，将生理需求比作自然的召唤，起源于19世纪英语口语。