The true test of a civilization is how it treats its weakest members.
一个文明的真正考验在于它如何对待最弱小的成员。
能源的未来在于找到传统资源和可再生替代品之间的平衡。
Sustainability is not an option; it's a necessity for the future of our industry.
我们都是破碎的，这就是光进入的方式。
To do mathematics is to explore a universe of ideas, where the only limit is your imagination.