Usage priority
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
不是
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不是
A contraction for are not and am not; also used for is not.；[Colloq. or illiterate speech]. See An't.
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不是
A contraction for are not and am not; also used for is not.；[Colloq. or illiterate speech]. See An't.
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Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from ECDICT.