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单词 be hard at it/work
释义 be hard at it/work be hard at it/work  → be hard at it/work at hard1(7) to be very busy doing somethingbe hard at it/work  
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初中学习网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。

　

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更新时间：2025/11/4 0:44:57