pounce on (或upon)

• • 突然向…攻击；扑向并抓住：

    Policemen were hiding themselves in the corners of the bank, ready to pounce on the thieves.

    警察隐藏在银行的角落里，准备向窃贼突然攻来。

  • 对…不满；攻击…；抓住(某人的错误)不放：

    This is the kind of careless mistake on which examiners love to pounce.

    这是一种主考人喜欢抓住的粗心错误。

  • 抓住并大肆利用某事物：

    The scientists doing the experiment have pounced on the effect of the particular moment.

    做实验的科学家们抓住了这个特殊时机的效果。