石墨烯是一种灰姑娘材料：它一直存在，但没有人注意到它。

To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things, every single day.

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。

我们不是从祖先那里继承了地球；我们是从子孙那里借来的——这必须指导每一个商业决策。