Epithelia
pl. 上皮\\n[醫(yī)] 上皮
??? 情景例句
I suggest that you tear up the letter and start over again.
我建議你把信撕掉重新再寫。
What is happening out there?
外面發(fā)生什么事情？
I can't afford to go to a restaurant every day.
每天都去餐館吃飯，我真是支付不起。