关于小便, 正规的说法是: Urine (名词), To urinate(动词). 口语的话就说: Pee, 例如: I wanna pee.
大便: The stool 或是: Feces (名词). 动词是: To have a movement, 或: to have a bowel movement. 或者就说: I have to go the restroom. Or: I wanna go to the bathroom.(比较文雅点), 还有更男化一点的就是: He has gone to stool (他去大便了).
肚子疼: Stomachache, 其实就是腹疼, 但是我们一般就说是肚子疼. Abdominal pain是腹肌肉痛, 可能和超负荷锻炼有关.
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