世界上充满了看不见的伤口。
以太网被设计成简单、廉价且能够处理广泛应用的网络。
Once you understand how to write a program get someone else to write it.
任何圆的面积等于一个直角三角形,其中一条直角边等于半径,另一条等于圆的周长。
The best thing about getting older is that you don't lose all the other ages you've been.