美国常用英语俚语:Call of nature[去洗手间]
【句子对照】
If you have to go to the bathroom then go; don't fight the call of nature. 你要是想去洗手间的话就去吧，不要忍着。
【关键俚语】
Call of nature 英：The need or urge to go to the toilet; sudden impulse to relieve oneself. 中：要去洗手间/厕所
