我们今天种下的每一棵树都是对明天的承诺。
Every tree we plant today is a promise to tomorrow.
The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.
对我们森林最大的威胁不是伐木，而是漠不关心。
我相信可互换零件的原理将在未来制造业的进步中发挥巨大作用。
The challenge in auction theory is to balance simplicity with strategic sophistication.