"What you want to see over time is this number move not only below 450 , but below 400,000 before the economy is generating the strong job gains that we would all like to see.

VOA: standard.2010.05.20

So that you take every sodium and you count all of its nearest neighbors, next nearest neighbors, next next nearest neighbors, not only on a line but in the plane and above and below in all three dimensions and go through that calculation, it is even more negative.

你考虑到每一个钠原子,你要考虑到它最近的原子，第二近的原子，第三近的原子，不是在一条线而是在一个面上,以及面上与面下的三维空间,再完成计算，这将会更负。

麻省理工公开课 - 固态化学导论课程节选

A corporation is an entity that could be sued or could lose more money than it's worth, but the value of a corporation can never fall below zero to the investors because the investors are not liable for the mistakes of the corporation.

公司是一个实体,它可能被起诉,或者亏损额超过了自身的价值,但是对于投资者而言,公司的价值永远不会小于零,因为投资者对公司的过失,不负有责任

耶鲁公开课 - 金融市场课程节选