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三 思 而 行 , sān sī ér xíng think twice 
处 理 这 个 棘 手 的 问 题 , 望 你 三 思 而 行 , 切 莫 鲁 莽 。  I hope you’ll think twice before you deal with this difficult issue, and not do anything rash. 

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"Collins Chinese Dictionary 1st edition © HarperCollins Publishers 2004"