The biggest risk is not taking any risk.

光的理论实际上是物理学两大理论的交汇点，即粒子理论和波动理论。

The context is so important. The context is not just the physical context, but also the historical and cultural context.

The historian must have a kind of faith that humanity will not and cannot perish.

Writing is a form of freedom.

艺术是未来生存的一种方式。