求一句话的理解(英文)

问题描述:

求一句话的理解(英文)
原句:There is no necessarily intrinsic connection between a word and the thing it refers to; th relation is purely conventional.请问这句话怎么理解?

一个字符和它所指代的事物没有内在的联系,两者的关系是约定俗成的.