International politics is a ruthless and dangerous business, and it is foolish to expect states to behave according to moral principles.

有时候你得有点调皮。

技术没有捷径，只有不断积累和突破。

Love is the supreme positive emotion, the one that encompasses all others. It is the feeling of positive resonance that you experience when you connect deeply with another person.

最危险的幻觉是被我们误认为现实的那些。