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 past beats inside me like a second heart.

男孩和他的心已经成为了朋友，彼此都无法背叛对方

做出伟大工作的唯一方法就是热爱你所做的事情

以太网被设计成简单、廉价且能够处理广泛应用的网络。