中文摘要：

语码切换是双语者在两种或多种语言（或方言）之间转换的过程。在介绍语码切换的研究范式和理论模型,概述影响语码切换及代价的因素之基础上,提出对未来研究的设想,以为研究双语者的语用提供重要的途径。

英文摘要：

Code-switching is a process in which two speakers transfer languages in the context of the bilingualism or muhi-lingualism. This paper introduces research modes and theoretical modules of codeswitching and costs on basis of which proposals are put forward for future study.