一定要的用法和樣例：
例句
-
你要是到倫敦來，一定要到我們這裡住住。
If you ever visit London, you must come and stay with us. -
你一定要維護自己的權利。
You must stand up for your rights. -
我一定要就那個問題和你辯論。
I must take you up on that point. -
要做個好推銷員一定要有闖勁才能成功。
A good salesman must be aggressive if he wants to succeed. -
父母對孩子一定要嚴格。
Parents must be firm with their children. -
你一定要和我們一起吃午飯。
You must join us for lunch. -
我一定要把頭髮理一理了。
I must have my hair trimmed. -
公司一定要在市場中有競爭力。
Companies must be able to compete in the marketplace.
