英语中有一种惯用短语,由连词and采用A and B格式连接而成,表达一个完整概念。人们习惯把这样的短语称之为“成对词”。尽管它们属于封闭类,其数量难以随社会的发展而增加,其出现频率却很高。笔者下边对其作简单介绍。 There is an idiomatic phrase in English, which is composed of conjunctions and connected in A and B format to express a complete concept. People are used to calling such phrases “paired words.” Although they belong to the closed category, their number is difficult to increase with the development of society, and their frequency is high. The author gives a brief introduction to it.