This structure must be stable.
這種結構一定很穩固。
Accurate records must be kept.
必須儲存準確的`記錄。
You simply must read this book.
這本書你可一定要看一看。
We must work together, brothers!
我們必須攜手工作，夥計們！
We must set realistic goals.
我們必須制訂可實現的目標。
I must admit I am impressed.
我得承認我很佩服。
You must get home before curfew.
你必須在實行宵禁以前回到家中。