言语者在讲话时选择不同的语码是在构建或维持某种社会关系。表明言语者的民族社会文化身份。这种选择受到社会规约的制约,宏观上讲,一个国家或地区的语言规划和语言政策对言语者语码的选择产生了显性和隐性的导向作用。 Speakers choose a different code in their speech is to build or maintain a social relationship. Indicate the speaker’s national social and cultural identity. This kind of choice is constrained by the social statute. On the macro level, language planning and language policy of a country or region have a dominant and implicit guiding function on the choice of speech code.