宇宙是一个广阔而神秘的地方，我们才刚刚开始理解它的秘密。
The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
最成功的企业是那些把客户置于一切工作中心的企业。
Great businesses are built on great relationships.