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 publication covers a range of key areas, such as legal, social, economic, health and environment implications of e-waste.

UNESCO: MEDIA SERVICES

And, in no small quibble, the winery pricing is also in the affordable luxury range, a key factor.

FORBES: Connect

The weekly OBV is still holding in its trading range and is holding above key support.

FORBES: The Dow's Most Oversold Stocks