现实永远是起点。

我们需要确保互联网保持开放，让所有人都能访问。

"We are all immigrants in time."

In the end, we are all defined by the choices we make.

In the world of physics, we often find that the simplest questions are the hardest to answer.

创建和维持大型复杂组织的能力是区分成功社会与不成功社会的关键因素之一。