How can a slim chance(13) and a fat chance(14) be the same, while a wise man(15) and wiseguy(16) are 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(wiseman)改一个词，就沦落为自作聪明的人(wiseguy)。

He has a slim chance of winning the lottery.

他赢得彩票的机会苗条。

A slim chance and a fat chance can be the same.

机会不管是瘦还是肥都是一个意思.

He acknowledged that his chance of winning slim chance Lagarde was quite high.

他承认，自己获胜希望渺茫，拉加德机会“相当高”。

Her slim chance for survival lay in finding a bone marrow donor.

她微弱的生存机会取决于找到合适的骨髓捐献者.