So it doesn't matter how big the dictionary is, you can instantaneously retrieve the value associated with the key. Extremely powerful.

因为你可以在线性时间，内得到想要的键对应的值,这太强大了。

麻省理工公开课 - 计算机科学及编程导论课程节选

Gas phase single atom. So we don't have to deal with work function or any kind of energies associated with some condensed form of matter.

气相的单原子，所以我们不需要再,处理功函数的问题,以及和凝聚态相关的能量问题。

麻省理工公开课 - 固态化学导论课程节选