以太网被设计成简单、廉价且能够处理广泛应用的网络。

The great thing about being old is that you don’t have to worry about the future.

Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.

和一个人玩一个小时对他的了解,胜过于一年的对谈

自由是无价之宝。