英語翻譯：

certainly; must; surely

例句：

1. 你從圖書館借的書上的戳記表明，這本書必須明天歸還。
   The stamp in your library book shows it must be returned tomorrow.
2. 去倫敦之前，我必須好好溫習一下英文。
   I must brush up my English before I go to London.
3. 我必須找人把收音機修理好。
   I must get the radio fixed.
4. 孩子用的家具必須經得起拳打腳踢。
   Children's furniture must withstand kicks and blows.
5. 這個劇目播出前必須經過數次剪輯。
   Before this play is broadcast several cuts must be made.
6. 如果你努力，你就會成功，那必然是真的。
   It follows that if you work hard, you will succeed.
7. 無疑，每個結果必定有其原因。
   It's certain that every effect must have a cause.
8. 必須得想個辦法。
   Something must be done about it.