词典释义：
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Don't knock. Just walk in. Why be polite to the world's leading expert on the dung beetle?
别敲门，尽管进来吧，对一位世界领先地位的屎克螂专家客气什么啊？
《The Big Bang Theory Season 3》《生活大爆炸 第三季》
双语例句
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She forced herself to be polite to them.
她对他们强装客气。
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We should be polite to the old.
我们应该礼貌对待老人。
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Please be polite to our guests.
有礼貌的；客气的；儒雅的。
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We should be polite to everyone.
我们应该礼貌待人。