You must signal which way you are going to turn.
你要朝哪個(gè)方向轉,必須發(fā)出信號。
You're a great help, I must say!
我得說(shuō),你可沒(méi)少幫忙!
There must be a way around the problem.
肯定有解決這個(gè)問(wèn)題的辦法。
The work must be completed within a certain time limit.
這項工作必須在一定期限內完成。
There is a growing realization that changes must be made.
越來(lái)越多的人認識到改革勢在必行。