真假的问题始终存在，但并不总是可以回答的。
这就是学习的意义。你突然以一种新的方式理解了你一生都理解的东西。
The past is a shadow that clings to our heels.
The wise seek the truth, fools seek entertainment.
能源的未来不是要在煤炭和可再生能源之间做出选择，而是找到正确的平衡。
The uniform， constant， and uninterrupted effort of every man to better his condition， the principle from which public and national as well as private opulence is originally derived.
