他（一口一口地）吸着烟斗。

He puffed (away) on his pipe.

《牛津词典》

他细嚼慢咽地吃着饭，一口一口地品味。

He ate his meal slowly, savouring every mouthful.

《牛津词典》

我以前就说过，饭要一口一口地吃，路要一步一步地走。

I've said it before, take one bite of the elephant at a time.

youdao

But in terms of us going to the grocery store and thinking about things, probably we're all breathing sighs of relief.

但是如果我们走进商店,以后想到这些的话，我们都应该松一口气。

麻省理工公开课 - 化学原理课程节选

So study this, master this pattern as well as the other patterns, and you really can master English step by step.

因此，学习掌握这个句型以及其他所有的句型，你就可以一步一步说一口流利的英语。

There is 课堂 - SpeakingMax英语口语达人

He arrived in the land of Midian, and sat down beside a well.

逃往米甸，并且在一口井边定居。

耶鲁公开课 - 旧约导论课程节选