臨渴穿井 [ㄌㄧㄣˊ ㄎㄜˇ ㄔㄨㄢ ㄐㄧㄥˇ; lin2 ke3 chuan1 jing3] lit. face thirst and dig a well (idiom); fig. not to make adequate provision to act when it is too late ◄ ►