没有“悲哀”提供平衡，“愉快”一词就会失去意义。

Entrepreneurship means never giving up and finding opportunities in difficulties.

我在追随自然，却无法完全抓住她。

I don't think that you have any insight whatsoever into your capacity for good until you have some well-developed insight into your capacity for evil.

可持续能源解决方案将定义21世纪。

颠覆与科技无关，而与商业模式有关。