一般是用 to make（或 have）a bowel movement 或 to take a shit。如果看病，医生常问：「Do you have regular bowel movement？」（大便正常吗？）（说得斯文些，就是「大肠在转动」）此外，还有其他的说法： to defecate =to discharge excrement（或 feces）=to take feces （或 faeces）。 例如：* The patient needs to take a shit. （=to make a bowel movement）不过，小孩多半是用 to make a poo poo 或 to make a BM. 。 例如：* The boy had a stinky BM.（大便奇臭。）但是「大便检查」倒叫做 stool exam，因为 stool 也是一种化验的样品。 例如：* The doctor has to exam his stool.（医生要检查他的大便。)放屁在美语里最常用的是 to expel gas 或 to fart 或 to make （或 pass）gas。 例如：* 医生有时问：「How often do you expel（或 make 或 pass）gas？」（你放屁的次数很多吗？）* Is the gas expelled by belching？（是否打嗝后就会放屁呢？）（动词是 belch）* He said the more he ate, the more he farted.（吃的愈多，放屁也愈多。）* He has passed more gas than usual within the last two days.（过去两天中，他放屁比平常多。）* Be careful not to fart in the public.（注意在公共场所不可放屁。）至于消化不良，大便不通或拉肚子，也有不同的说法。 例如：* I have an upset stomach.（消化不良） = I have heartburn. = I have indigestion.（注意：Heartburn 是指胃不舒服，不是「心痛」（heartache）* Something has upset my stomach for two weeks.（胃不舒服有两星期了。）* He has（persistent）constipation.（或 irregularity）（他经常便秘。) 或* He has been unusually constipated.（便秘很反常。）或* He is having problem with irregularity.（或 constipation); 或* He has no bowel movement for the past few days.* He has bouts of diarrhea.=He is having trouble with diarrhea.（他拉了一阵肚子。）* He can see trace of blood and pus or mucus in his stool（或 bowel movement）（大便时可看到血丝和粘膜。）参考资料：http://englishhome.bokee.com/3661666.html 已赞过已踩过<
