说明：  C语言是七十年代初贝尔实验室的Dennis Richie 等人在B语言基础上开发出来的。C最初是作为UNIX操作系统的开发语言为人们所认识。
(C language is the early seventies Dennis Richie at Bell Labs, who developed the B language basis. C UNIX operating system was originally developed as a language for people to know.)