You should not judge something only by its appearance.

VOA: special.2009.08.30

You might think that its function is to make you more - a better cyclist but that's not its only function.

你也许只知道它的作用是--,使你成为一个更好的自行车手,但这并不是它的唯一功能

耶鲁公开课 - 生物医学工程探索课程节选

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