I'm going to start with the simplest example and slowly add on bells and whistles and make it more and more complicated.

我会从最简单的例子开始,逐渐增加难度,让问题越来越复杂

耶鲁公开课 - 基础物理课程节选

But I want to start in every example, in every situation that I explain to you, with the simplest example, and slowly add on things.

所以我会都从最简单的例子讲起,在我给你们解释的每一个例子里,都会用最简单的例子,然后慢慢增加难度

耶鲁公开课 - 基础物理课程节选

They will start out simple and, as usual, they will get progressively more difficult.

我们从简单的开始,我们照旧循序渐进慢慢加大难度

耶鲁公开课 - 基础物理课程节选