答案解析

查看更多优质解析解答一举报laborious adj.

(指工作)艰苦的,

费力的,

(指人)勤劳的 industrious 如：I knew that he was an industrious man.

我知道他是一个勤劳的人.

hard-working 如 a hard-working student 一个勤劳的学生 diligent 如：She is .

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