So the first step to doing that is I want to just generalize our results so far for a Carnot cycle.

第一步,首先来推广一下,卡诺循环的结果。

麻省理工公开课 - 热力学与动力学课程节选

I would first of all, congratulate you for taking the first step of starting to learn that process.

我会首先祝贺你踏出了学习语言的第一步，

学第二外语的时候 - SpeakingMax英语口语达人

And in terms of thinking about it for organic chemistry or if you're interested in thinking about the mechanism maybe by which it is toxic, a first step would be to draw its Lewis structure.

而为了在有机化学中思考它,或者如果你对它,有毒的机理感兴趣的话，第一步要做的应该就是画出它的路易斯结构。

麻省理工公开课 - 化学原理课程节选