区别就是，riddle是Puzzle的一种，比较幽默滑稽的那种。puzzle的概念大，riddle的概念小。所以词典里解释是： A riddle is a puzzle or joke in which you ask a question that seems to be nonsense but which has a clever or amusing answer
A puzzle is a question, game, or toy which you have to think about carefully in order to answer it correctly or put it together properly.
