The decline of violence may be the most significant and least-appreciated development in the history of our species.

世界是一面镜子，反映出我们带给它的东西。

If you start out by promising what you don't even have yet, you'll lose your desire to work toward getting it.

作家的生活是一个毫无意义的问题。我对书感兴趣。

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

世界是一个无限复杂的地方，我们都在试图理解它。