自然界的现象，无论是机械的、化学的还是生命的，几乎完全在于通过空间、活力和热之间的持续相互转化。
这是一首幽默的打油诗，调侃数学的复杂性。
物理学的美丽在于它能够用简单解释复杂。
我是一个普通人，只是碰巧网球打得好。
"Maybe you can afford to wait. Maybe for you there’s a tomorrow. Maybe for you there’s one thousand tomorrows, or three thousand, or ten, so much time you can bathe in it, roll around it, let it slide like coins through your fingers. So much time you can waste it. But for some of us there’s only today. And the truth is, you never really know."
