可持续发展不再是可选项,而是我们对后代的责任。
除非把爱国主义从人类中剔除,否则世界永远不会安宁。
Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.