none of one's business 不关某人的事 ; 与某人无关
it's none of one's business 不关某人的事
none of one's business
不关别人的事
以上为机器翻译结果，长、整句建议使用 人工翻译 。
As Dewey put it, the relation of the abilities of one student to another is none of the teacher's business."
VOA: special.2010.01.07
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