说明：  C语言是一种通用的程序设计语言，语言本身简洁、灵活、表达能力强，被广泛用于系统软件和应用软件的开发，并且具有良好的可移植性。
(C language is a general programming language. It is simple, flexible and expressive. It is widely used in the development of system software and application software, and has good portability.)