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。
The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.
人们知道礼节，就会恭敬他人；做到恭敬之后，就会懂得尊让。
言语是我们唯一的家园。
Overhead, without any fuss, the stars were going out.
诚信是持久成功的基础。
We cannot be sure of having something to live for unless we are willing to die for it.
Mental activity is the organism's dialogue with its environment.