Benzanthacene
[機] 苯并
??? 情景例句
When do you think we'll be through?
你認為我們什么時候能完畢？
You were late again this morning. I think you had better start being on time.
你早晨又遲到了，我想你最好開始守時。[托福]
Yes, it is.
是的，我就是。