catch on

• • 钩住，卡住；绊住：

    She caught her foot on the threshold and stumbled.

    她的一只脚被门槛绊住而跌倒了。

  • 理解，明白；熟悉情况(常与to连用):

    Please repeat what you said, I didn't quite catch on.

    请把你的话再说一遍，我没十分听明白。

    You'll catch on to the job after you've been here a while.

    过一段时间你就会熟悉这种工作了。

  • 变得入时，流行起来；迎合人心：

    This song caught on and was sung everywhere.

    这首歌曲流行起来，各地都在演唱。