1.医学术语:diarrhea
如:He has trouble with diarrhea.
他拉肚子。
I had diarrhea. I wonder if I eat something bad yesterday.
我拉肚子，我怀疑是否昨天吃了不新鲜的东西。
2.口语
have loose bowels
have the runs
如:
I have loose bowels.
我拉肚子。
I still have the runs. I do not think I should eat anything today.
我还在拉肚子，今天不要吃东西比较好吧。
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