安全困境是国际政治的一个基本特征，因为国家增加自身安全的努力往往会降低其他国家的安全。
You can't just sit there and wait for people to give you that golden dream. You've got to get out there and make it happen for yourself.
人们对他们所爱的人最残忍。
挑战让我们成长；用勇气和决心去迎接它们。
长城汽车的发展离不开每一位员工的努力和奉献。
There'll always be serendipity involved in discovery.
The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.