在所有的动物中，只有人类是残忍的。他们是唯一将快乐建立在制造痛苦之上的动物。

行为的目标总是某种驱力或需求的减少。

The future of energy will require collaboration across industries, governments, and societies.

Systems have sub-systems and sub-systems have sub- systems and so on ad infinitum - which is why we're always starting over.

事情在完成之前总是看起来不可能。