历史首先是那个遗产的创造和记录；进步是其日益增长的丰富性、保存、传递和使用。

Don't ever let anybody tell you they're better than you.

约化群理论是朗兰兹纲领的支柱。

The six colors， including the white background， represent the colors of all the world's flags ... this is a true international emblem.

人心真是一个难以琢磨的东西！