The thesis of 3.091, and this is where the chemistry comes in, is that electronic structure of the elements holds the key to the understanding, not just the chemical bonding, but the long range atomic order.

这是这门课的论点，这是化学的研究点，也就是元素的电子结构,那即是理解的关键，不只是化学键，还有长程的原子排序。

麻省理工公开课 - 固态化学导论课程节选

The family and the individual are the critical elements.

家族和个人是关键性元素

耶鲁公开课 - 古希腊历史简介课程节选

So, it is from the beginning a society in which the community is a critical element, maybe the critical element, an individual who didn't live in a society could not achieve the kinds of glory and fame,and recognition that you expect from a hero.

所以,它最初是这样一个社会,在这个社会中,集体是一个关键性元素,也许是唯一的关键性元素,一个没有社会生活的个人是得不到,荣誉,名望,赏识,这些英雄们才能拥有的东西的

耶鲁公开课 - 古希腊历史简介课程节选