class interrupt [计] 类中断 ; 分级中断
It is impolite to interrupt teachers with jokes during class.
在上课时用玩笑话打断老师是不礼貌的。
Don't interrupt your teacher. Ask her questions after class.
不要打断老师，下课再问问题。
Middle class kids? Their parents urged them to be proactive, even to interrupt their teachers for help.
那中产阶级的孩子们呢？他们的家长敦促他们要积极主动，甚至为了求助打断老师。
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