catch at

• • 抓住：

    They catch at every opportunity to make money.

    他们抓住一切机会来赚钱。

  • 试图抓住；攫取：

    The drowning boy caught at a rope thrown to him, but missed it and sank.

    落水的男孩试图抓住抛向他的一条绳子，但是没抓住而沉没。

  • 抓获；发现(某人)在干(坏事)：

    I've caught you at your tricks again!

    我又抓到你在耍花招!