Lisp is worth learning for the profound enlightenment experience you will have when you finally get it; that experience will make you a better programmer for the rest of your days, even if you never actually use Lisp itself a lot.
语言不仅仅是交流的工具，更是塑造我们现实的方式。
The future of coal depends on our ability to innovate and reduce its environmental impact.
Every individual has a place to fill in the world and is important in some respect whether he chooses to be so or not.