The universe is not only stranger than we imagine, it is stranger than we can imagine.

The biggest risk is not taking any risk.

"The principles of a free society are essential for human progress and prosperity."

网球是一项残酷的运动。在那里无处可藏。

可持续性不是一种选择，而是我们共同的责任。

The Soviet Union was a civilization of fear, where people lived in constant dread of the knock on the door at night.

The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.