Fluorocarbon
[建] 碳氟化合物
??? 情景例句
When addressing a judge, always use 'your honor'.
在對(duì)法官說(shuō)話時(shí)， 一定要尊稱他為 'your honor'
He who imagines that he has knowledge enough has none.
自以為學(xué)識(shí)豐富的人是沒有什么學(xué)問(wèn)的人。
Where can I go for help?
我該怎么辦呢？