To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.

I always think about how to make batteries safer and more efficient.

未来能源结构将是多元化的，煤炭行业需要找准自己的定位。

有钱的单身汉总要娶位太太，这是一条举世公认的真理。