Refining it involves removing the outer layers, including the husk,bran and germ, leaving the inner white kernel.

VOA: standard.2010.06.25

There you have the roots and the kernel of the so-called "Positive good thesis "About slavery.

这样你就有了奴隶制,所谓"积极的一面"的根源和依据

耶鲁公开课 - 美国内战与重建课程节选

I would say that the crux, the kernel of the critique, a lot of things you can argue about-- The kernel of the critique lies in this assertion which derives its force from an interpretation of pictures on pottery.

其症结所在,批判思想的核心,很多事情都可以争论,核心在于一种论断,该论断是从彩釉的画面中,得到启示的

耶鲁公开课 - 古希腊历史简介课程节选