n.拐杖；支柱
v.支撑
He is lame in one leg and walks with the help of a crutch. 他的一条腿跛了，走路借助于拐杖。
Religion was her crutch in times of sorrow. 宗教是她忧伤时依赖的支柱。
The book was simply a crutch to my memory. 那本书是我的记忆的支柱。
