However, from a systemic functional viewpoint, cohesion, though realized by formal features, is itself a semantic concept.
然而，从系统功能语言学的观点来看，尽管衔接是由形式特征来体现的，但衔接本身是一个语义概念。
Discourse is a semantic concept.
语篇是一个语义范畴。
Research into information retrieval based on the combination of keyword and semantic concept;
新模型合理地考虑了术语关系，实现了基于语义概念的检索。
Research into information retrieval based on the combination of keyword and semantic concept;
新模型合理地考虑了术语关系，实现了基于语义概念的检索。
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