She was in time to stop the cat before it was too late.

她及时地拦住了那只猫 before it was too late 就是赶在了太迟之前 一般不用翻译

She was in time to stop the car before it was too late.

在危险来临前她及时地拦住了那辆车。

她在（事情发展地）太迟前及时地阻止了那只猫。

在来不及以前，她急时的阻止了猫。