语言是一种用于人类交流的任意声音符号系统。语言的定义应该包括语言的五个基本因素：系统的、任意的、声音的、象征性的和最重要的是人类特有的。\n首先，语言是一个系统，即语言元素是系统地排列的，而不是随机地排列的。\n第二，语言是任意的，因为语言符号和符号代表之间没有内在的联系。\n第三，语言是声乐的，因为所有语言的主要媒介都是声音或语言。\n第四，单词只是符号；它们与物体、行动、想法等有关，按照惯例。\n第五，语言是人类特有的，也就是说，它与其他生命形式所拥有的交流系统非常不同。\r\n\nLanguage is a system of arbitrary vocal symbols used for human communication. The definition of language should include five essential factors of language: systematic, arbitrary, vocal, symbolic and most importantly human-specific.\nFirst of all, language is a system, i. e., linguistic elements are arranged systematically rather than randomly.\nSecond, language is arbitrary in the sense that there is no intrinsic connection between a linguistic symbol and what the symbol stands for.\nThird, language is vocal because the primary medium for all languages is sound or speech.\nFourth, words are just symbols; they are associated with objects, actions, ideas, etc. by convention.\nFifth, language is human-specific, i. e., it is very different from the communication systems other forms of life possess.What characteristics of language do you think should be included in a good, comprehensive definition of language?