Relevance theory, a theory of language communication, depicts the inherent property of lan-guage communication within a culture.
关联理论是一种语言交际理论，揭示了单元文化内语言交际的本质属性。
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Even so, many proud Shanghainese use the lan-guage as a secret code to signal that they belong to the in crowd-and often to ensure fair deals in local shops.