Referential theory holds that a linguistic sign derives its meaning from that which refers to something in the reality.()
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Hyponymy is a relation of inclusion. Tiger, lion and dog are hyponyms of the word animal.()
In communicative language teaching, the teacher needs to fulfill at least the roles of
洼地-下渗系统代表了一种新的排水设计理念,即“径流零增长”。()