采石业的创新不仅关乎机械，还关乎远见和可持续性。

我是一个镜球，今晚我会向你展示自己的每一个版本。

Engineering culture is about pursuing perfection, but also accepting imperfection.

The mission of an entrepreneur is not just to make money but to create value for society.

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！"

你认为你的痛苦和心碎在世界历史上前所未有，但后来你阅读了。