The mother said she would let off her son washing the dishes if he could finish his assignment before supper.
母亲说如果儿子能在晚饭前完成作业,她就不让他洗碗。
He has just come off a difficult assignment.
他刚刚结束了一项艰巨任务。
It's a hard assignment to pull off, and I have some methodological concerns with the study.
这是一个艰巨的任务,而且我对此研究在方法层面便存有担心。
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