计算机是一种表达媒介，就像钢琴是一种表达媒介一样。
The computer is a medium of expression, like a piano is a medium of expression.
To be free is to accept responsibility for one's own life.
The writer is either a practicing recluse or a delinquent, guilt-ridden one.
数学中发现的快乐是无与伦比的。
