Well you know what a point is, it's got an x- and a y- coordinate, it's natural to think about those two things as belonging as a single entity.

把这两个坐标认为，是属于一个独立的实体，是理所当然的事情,因此实现这个目的的。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's easy to think of a point as just a list of an x- and a y- coordinate.

或者说有两个元素的数组,把一个点认为是含有x坐标。

麻省理工公开课 - 计算机科学及编程导论课程节选