In simple terms, think of snow or ice as a filter.

VOA: special.2010.01.05

Ultimately, we need a filter or a lens to talk about then what is ultimately in control.

最终，我们需要一个视窗，一个镜头,来讨论什么是最终的控制者。

普林斯顿公开课 - 人性课程节选

Ultimately, we need a filter or a lens to talk about then what is ultimately in control.

最终，我们需要一个视窗，一个镜头,来讨论什么是最终的控制者。

普林斯顿公开课 - 人性课程节选