讲解文本：

against the clock 争分夺秒地，抢在某一时刻之前
We are working against the clock to finish the report.
为了完成这一报告我们争分夺秒。
We can't wait, It's a race against the clock.
我们不能再等了，现在是一场争分夺秒的竞争。

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