This structure must be stable.
這種結(jié)構(gòu)一定很穩(wěn)固。
Accurate records must be kept.
必須保存準(zhǔn)確的記錄。
You simply must read this book.
這本書(shū)你可一定要看一看。
I must admit I am impressed.
我得承認(rèn)我很佩服。
You must get home before curfew.
你必須在實(shí)行宵禁以前回到家中。