可持续性不再是一种选择，而是任何希望长期繁荣的企业的必需品。
每个家庭都有自己的秘密，但在某些国家，这些秘密更大、更危险。
Symmetry is a complexity-reducing concept (co-routines include subroutines); seek it everywhere.
大约99%的时候，最佳时机就是现在。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.