"You are going to see an uplift of forces come in and I think you'll start to see this tightening ring of security in and around Kandahar city that I think will then provide the security bubble for governance to start to take in and development to start to take root in Kandahar city."

VOA: standard.2010.05.26

The only important thing to realize about that is that these differences start to occur very early in development.

唯一需要引起重视的是,这些差异发生在,发育阶段的早期

耶鲁公开课 - 生物医学工程探索课程节选

To start out I'm going to go back to the thinking about development a little bit, embryonic development, and show you a picture here.

作为这节课的开始,我先稍微回顾一下,一些关于发育过程的内容,先说胚胎发育,这里有张图

耶鲁公开课 - 生物医学工程探索课程节选

We can see the early signs of ear development Start with the thickening of the outer layer of the embryo, this layer is called the ectoderm.

大家知道，耳朵发育的早期特征,是胚胎外层膜的增厚，这层膜也叫外胚层。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选