We are like travelers who have lost their way； we must ask， each one， for directions from a passerby.
The power of words can change the world.
理解过去对于塑造未来至关重要。
在数学中，最简单的解释往往是最深刻的。
You are only as young as the last time you changed your mind.
The six colors， including the white background， represent the colors of all the world's flags ... this is a true international emblem.