HNC理论建立了概念语义网络，可以用来描述词汇的语义，描述词汇之间的概念联想脉络。
HNC theory sets up a network of concept. It can be used to describe the meaning of words and the associations between different' concepts.
介绍了“生态旅游”概念产生的脉络，辨析了主要的类似概念，建议使用同一概念，并提出了理由。
The choroids of concept production of ecological tourism were introduced, main similar concept were analyzed, and advised to use unified concept, and the causes were put forward.
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