At that age， I'd take any excuse to make estimates and do minor arithmetic. I'd calculate our gas mileage -- figure out useless statistics on things like grocery spending. I'd been hearing an ad campaign about smoking. I can't remember the details， but basically the ad said， every puff of a cigarette takes some number of minutes off of your life: I think it might have been two minutes per puff. At any rate， I decided to do the math for my grandmother. I estimated the number of cigarettes per days， estimated the number of puffs per cigarette and so on. When I was satisfied that I'd come up with a reasonable number， I poked my head into the front of the car， tapped my grandmother on the shoulder， and proudly proclaimed， "At two minutes per puff， you've taken nine years off your life！"

森林不需要我们，而是我们需要森林。

理论的最高形式是能够将复杂的事物简化为简单而清晰的原理。

创新不仅仅是创造新产品；它关乎我们如何重新构想解决问题的方式。

晏子春秋

Justice is not always served in the way we expect, but it is always served in some form.