事实是：自然界正在变化。而我们完全依赖那个世界。它提供我们的食物、水和空气。它是我们拥有的最宝贵的东西，我们需要捍卫它。

The double helix structure of DNA is one of the most beautiful and elegant structures in all of science.

To love truth for truth's sake is the principal part of human perfection in this world, and the seed-plot of all other virtues.

我不必成为任何人的榜样。