Around computers it is difficult to find the correct unit of time to measure progress. Some cathedrals took a century to complete. Can you imagine the grandeur and scope of a program that would take as long?

城市是一个活的有机体，不断演变。

Most of what makes a book 'good' is that we are reading it at the right moment for us.

你必须愿意失败才能成功。