可持续性不是一种选择,而是一种责任。
The man who is fit to work at any particular trade is unable to understand the science of that trade without the kindly help and cooperation of men of a totally different type of education.
人类的历史在很大程度上是与环境斗争的历史。
经济周期的福利成本并非周期本身,而是个体无法随时间平滑消费的能力。
"I'm always trying to push myself."