可持续性不是一种选择;它是我们对下一代的责任。
Sustainability isn't an option; it's our responsibility to the next generation.
错误同真理的关系,就象睡梦同清醒的关系一样。一个人从错误中醒来,就会以新的力量走向真理。
The most successful states in the future will be those that combine the rule of law and democratic accountability with effective governance.
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!"