We have a responsibility to future generations to leave the planet in better shape than we found it.

时间是一个从我们感知变化的方式中衍生出来的概念。

The coal industry is the backbone of America.

指挥家的指挥棒是一根能将噪音转化为美的魔杖。

交易的成功来自于不断的学习和适应。

The iron rule of nature is: You get what you reward for.If you want ants to come, you put sugar on the floor.