三思而后行 sānsī'érhòuxíng think twice Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 做重大决定时,必须三思而后行。 zuò zhòngdà juédìng shí, bìxū sānsī'érhòuxíng. When making major decisions, one must think twice before acting. Source: Dong Chinese Dictionary