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work hard at hard

来源：学生作业帮 编辑：作业帮 分类：综合作业 时间：2024/07/02 19:02:11
work hard at hard
work hard 是努力工作
hard work 是艰巨的工作.
所以合起来就是在艰苦的环境下努力工作.
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