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Spare the rod, spoil the child不打不成器
2.He says just the threat of physical punishment keeps kids in line and teachers agree.
keeps in line保持一致,使步调一致,遵守规矩
3.The Health Department says some of the problems have been cleaned up but others remain.
clean up打扫; 清理
例句：This room needs cleaning up.
这间房间需要打扫一下。
Boys and girls, clean up for dinner.
孩子们, 收拾干净准备开饭吧!
