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