think carefully before you act
老师有点生气了 think carefully before you act.三思而后行 walt invented the steam engine.瓦特发明了蒸汽机 .
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三思而 think carefully before you act 三思而行是一个很通俗的说法 look before you leap is a familiar expression
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think carefully before you act
三思而后行
以上为机器翻译结果，长、整句建议使用 人工翻译 。