真理是永恒不变的。
The best way to predict the future is to create it.
Every building tells a story, and it is the architect's job to make sure it is a good one.
革命是一场漫长而艰苦的斗争,但它是实现真正独立和自由的唯一途径。
化学的进步以新元素的发现和分析方法的改进为标志。