1、苦思
(使)迷惑；为难；苦思 puzzle over / about sth. 对某事苦苦思索 .
2、苦思苦想
...puzzle out 经过苦思想出; 猜出puzzle over 苦思苦想puzzled adj. 迷糊的,困惑的 ...
puzzle over the question对此问题迷惑不解
puzzle over sth苦苦思索;对某事感到迷惑
puzzle over problem为问题伤脑筋
to puzzle over sth对某事冥思苦想
puzzle over the matter对那事绞尽脑汁
I Puzzle Over Things我苦心思索事情
puzzle over think hard about冥思苦想