The lion crouched ready to pounce.

狮子蹲下身，准备猛扑。

《牛津词典》

The Democrats were ready to pounce on any Republican failings or mistakes.

民主党人准备要抓住共和党人的瑕疵或错误不放。

《柯林斯英汉双解大词典》

A mighty beast rises out of the water, ready to pounce on some unsuspecting prey.

一头凶猛的怪兽破水而出，并随时准备给毫不设防的猎物致命一击。

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Benny Avni scolded the dog, which became fiercer and looked nearly ready to pounce.

NEWYORKER: Waiting

Then, when they delivered a fairly ordinary performance, the press were ready to pounce.

BBC: Steve Harmison takes a wicket

When an opportunity arises with a company he is interested in, Alwaleed is ready to pounce.

FORBES: The optimist