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.

I'm not a star, I'm a galaxy.

泽畔野鸡，宁愿走十步远去啄食，走百步远去饮水，也不希望被关在囚笼里。

加强国际合作，推动煤炭行业技术和管理水平的提升。