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。
In this paper, cluster centre and the distance from point to the cluster centre was defined, and a dynamic analysis method for plane point set 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。
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.
利用该平面坐标网二叉树，把平面中的网格点一一映射到一个整数集合上，从而可以把平面中的任意点近似地映射为一个整数，而且可以任意精确，对任意平面图形图象的处理、储存和传输起着极其重要的作用。
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