That's simple, and he just started playing the best tennis of his life, just remembering what it's been like for him.

很简单，他就已经,开始打网球生涯中最好的表现，仅仅是记起了比赛的真正含义。

普林斯顿公开课 - 人性课程节选

Great question. It was easy and fun in the beginning,

好问题。一开始很简单，有意思，

成为教练的理由 - SpeakingMax英语口语达人

We started out with a few simple assumptions and look at what we are doing now.

我们从一些很简单假设开始,走到了日常应用。

麻省理工公开课 - 固态化学导论课程节选