说明：这是一本很经典的关于C程序设计语言的英文书，喜欢英文的朋友不妨可以看看。
This is a very classic on the C programming language, English books, like English friends may wish to look.
喜欢免费的朋友不妨试试这个服务，搭建会议活动网站，推广，统计分析等功能都是免费提供。
All I mentioned above is free, you can try this free service for set up events website, promotion, and statistical analysis.
如果有段日子没见某个朋友，不妨约个饭局或发封电子邮件。
Make a lunch date or send an email to a friend you haven't seen in a while.
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