"In terms of diplomacy and conflict resolution, he did say that resolving the Israeli-Palestinian issue was a major input, and he immediately named Senator George Mitchell as his envoy in order to work on that particular issue,"

VOA: standard.2009.04.24

We're going to build up this taxonomy if you like, but the reason it's relevant is, associated with each one of those types is a set of operators that expect certain types of input in order to do their job.

我们将会建立这种分类，但是这相关的原因是，对于每种类型都有,和之对应的一个操作集,这个操作机对一些输入,做出规定的操作。

麻省理工公开课 - 计算机科学及编程导论课程节选