catch on

catch on
(使)意外地挂在…
The kite caught on the electric wires.
那个风筝勾住电线了。
catch sb/sth on sth
He caught his foot on a tree root and stumbled.
他一只脚绊在树根上,几乎要跌倒。
I would have been early enough, but I caught my coat on a nail just as I was leaving.
我本来会早来,没想到我正要离开时,外套被钉子钩住了。
The ball caught him on the head.
球打在他的头上。
用于 be ～ed 结构
My sleeve was caught on a nail.
我的袖子被钉子挂住了。