With a computer,recorder,and camera, this language activist can work toward creating a dictionary of the Ishir language.

VOA: special.2009.12.02

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