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.
I have often been asked how my plays come about. I cannot say. Nor can I ever explain to myself what they mean.
The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.
数学证明的美在于它的简洁性和必然性。
团队合作是企业成功的关键，一个人的力量有限，但团队的力量是无限的。
译文：读过的旧书要反复地阅读，读透读深才能知道书中的道理。赏析：经典的好书必须要反复阅读，常读常新，读懂书中的内容就会受益匪浅。