英语短语词组词汇be hard at的音标、释义、翻译、用法及例句-英语短语词组词典-福建条码网

短语	be hard at
释义	be hard at努力从事;努力做：We are in duty bound to be hard at our work no matter what work we are engaged in.无论我们做什么工作，我们都有责任把它努力做好。
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