Time is a concept that is derived from the way we perceive change.
时间是一个从我们感知变化的方式中衍生出来的概念。
美国没有永恒的敌人，也没有永恒的朋友，只有永恒的利益。
"We are all made of starstuff, and it's our destiny to explore the stars."
创造就是赋予之前不存在的东西以生命。
研究不仅仅是回答问题，还要提出正确的问题。
Security is sleeping in the back seat of the car...When you're a little kid, and you've ben somewhere with your Mom and Dad, and it's night, and you're riding home in the car, you can sleep in the back seat...You don't have to worry about anything...Your Mom and Dad are in the front seat, and they do all the worrying...But it doesn't last! Suddenly, you're grown up, and it can never be that way again!
"Every word we write is a step towards understanding ourselves and the world around us."
可持续性不是选择，而是必然。