tell me how come this would happen?
问题描述：
tell me how come this would happen?
for what reason does quicksand flow slowly,slim chance equals to fat chance and a wise man and a wise guy are the opposites?
why?
答
Quicksand can work slowly
动作很慢的流沙被称为“快沙”（沙漠里馅进去,就爬不起来）；
slim chance equals to fat chance and a wise man and a wise guy are the opposites
胖瘦截然相反,可后面跟着chance就都变成“机会渺茫”了；聪明人（wise man）改一个词,就沦落为自作聪明的人（wise guy）.
这些词都是经过几百年沉淀的精髓,有时候反其道而行之,大部分成了；俚语和谚语!