Explain the following statement For any natural language, a set

Explain the following statement For any natural language, a set of syntactic rules are capable of yielding an endless number of sentences in that language.
【正确答案】：(1)The syntactic rules of any language are finite in number.(2)There is no limit to the number of sentences native speakers of that language are able to produce and comprehend. (3)For speakers to produce and comprehend well-formed sentences, the utterances must follow a fixed set of formal rule. (4)New sentences are created frequently and understood by the speakers of a language who have never heard or produced these sentences before.
(P60)：对于任何一种自然语言,一套句法规则可以产生出无穷多的句子,也就是说,任何语言的句法规则都是有限的,而说话人能够说出和理解的句子的数量是无限的。一方面,要使说话人说出并理解合格的句子,话语必须符合一套固定的正式规则;另一方面,讲某种语言的人经常说出并理解一些新句子,而这些句子说话人以前从没听过或说过。很明显,如果句子不是由数量有限的特定方式所构成,说话人根本就不可能说出、理解并记住他们本族语中数量如此巨大的句子。