词典
例句
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简体中文
know the world
know through and through
know what it is
know what o'clock it is
know what one is about
know what's what
know which side one's bread is buttered on
know without a doubt
know-all
参考
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know what one is about
➞
know what one is about
Definitions
[1] 做事精明, 做事周密
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简体中文
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know what one is about