只要我还有一口气，就要为人民工作。

I will work for the people as long as I have a breath left in my body.

一口气把文章写好

write the whole essay in one go

一口气念完

finish reading all in one go

一口气喝干

finish in one gulp

他一口气把书读完了。

He read the whole book in one sitting.

小孩一口气跑回了家。

The child ran all the way home without stopping.