後車之鑒 [ㄏㄡˋ ㄔㄜ ㄓ ㄐㄧㄢˋ; hou4 che1 zhi1 jian4] lit. warning to the following cart (idiom); don't follow the track of an overturned cart fig. draw lesson from the failure of one's predecessor learn from past mistake once bitten twice shy ◄ ►