Freedom of the press is not just important to democracy, it is democracy.
用程序证明四色定理不会改变数学——它只是证明了这个挑战了一个世纪的定理是一个有限的问题。
诗人是一个能在最丑陋的事物中找到美的人。
Sustainability isn't an option; it's a necessity for the future of energy.