计算使树木开花。

可持续性不是选择，而是我们对后代的责任。

In the world of physics, we often find that the simplest questions are the hardest to answer.

内疚就像一袋砖头。你所要做的就是放下它。

Sustainability isn't a trend; it's the future of energy.

写作古文的难度，比登上青天还要难。