委婉语

（3）在公众场合要讲究礼仪，有必要使用委婉语表达“排泄”这些“不雅”之事。
to urinate or defecate（大小便）answer nature’s call
go to the toilet（上厕所）to wash one's hands/to excuse one for a while
（4）为了顾及对方的自尊心，取悦对方，对缺陷不能直陈其事。
thin or skinny（皮包骨）slender
fat（胖）heavy
on dietweight-watcher
acne（粉刺）problem skin
the handicapped（残疾人）different abled/challenged/inconvenienced

Hehe, I continue sit on the sofa and study it![s:9]

cool, it is very usefull,

I rarely hear people use go to toilet.

Go to restroom.