catch on
1．become popular；be done or used by many people 流行；受欢迎；被很多人接受
This novel caught on well．这本小说深受欢迎.
It's a nice tune and will catch on quickly．这首曲子很好,不久就会流行开来.
If only the idea could catch on,we should be able to make quite a lot of money out of it．但愿这个主意被采纳,那么我们就能从中赚一大笔钱.
2．finally understand；grasp the point of 理解；明白；领会
After two hours of trying to learn the new game,he caught on．这种游戏,他学了两小时才明白是怎么回事.
He didn't catch on to what you had implied．他没有理解你话中隐含的意思.
The lady repeated her question several times but I still couldn't catch on．那位女士把她的问题重复了好几遍,但是我还是没听懂.
3．fasten accidentally on；catch；grab 挂住；抓住
My coat caught on a mail and tore．我的上衣挂住了一根钉子,撕破
The girl kept catching on to her mother's hand．这个小女孩一直抓住她妈妈的手.
希望对你有用好的话,