- 你从图书馆借的书上的戳记表明，这本书必须明天归还。
The stamp in your library book shows it must be returned tomorrow.
- 去伦敦之前，我必须好好温习一下英文。
I must brush up my English before I go to London.
- 我必须找人把收音机修理好。
I must get the radio fixed.
- 孩子用的家具必须经得起拳打脚踢。
Children's furniture must withstand kicks and blows.
- 这个剧目播出前必须经过数次剪辑。
Before this play is broadcast several cuts must be made.
- 如果你努力，你就会成功，那必然是真的。
It follows that if you work hard, you will succeed.
- 无疑，每个结果必定有其原因。
It's certain that every effect must have a cause.
- 必须得想个办法。
Something must be done about it.