我对那些人们认为不能用于永久结构的脆弱材料感兴趣。

想象力是让梦想成真的土壤。

We must balance the need for energy security with the imperative of reducing emissions.

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.  

在一个快速变化的世界里，诚信和质量的价值观是永恒的。