In this paper, cluster centre and the distance from point to the cluster centre was defined, and a dynamic analysis method for planepointset was put forword.
本文定义了聚类中心以及点到聚类中心的距离，提出了一种平面点集的动态聚类分析方法。
2
Several of the pager messages point to the mass of confusion and rumour-mongering that set in after the first plane hit the north tower.
有几条寻呼机信息表明在第一架飞机撞上北塔之后，人们产生了大量的困惑，谣言四起。
3
The net points of a plane can be mapped onto a set of integers in a one to one way based on the tree, so can any point of a plane be approximately mapped onto an integer with arbitrary accuracy.