The distinction between pheromones and odorants—chemicals that are consciously detected as odors—can be blurry, and some researchers classify pheromones as a type of odorant.
信息素和 odorants （被检测为气味的化学物质）之间的区别可能是模糊的，一些研究人员将信息素归类为一种 odorant。
Any class in the underlying ontology can be used as a classifier; the same classifier can be used to classify multiple entities and an entity can be associated with multiple classifiers.
基础本体中的任何类都可以用作分类器；可以使用同一分类器来对多个实体进行分类，并且一个实体可以与多个分类器关联。
According to speeches of the professors, we will classify topics as economy, culture, health, education, tourism and art. And there will be further discussions on the topics.
针对各位教授所做的发言，我们将整理出关于经济、文化、卫生、教育、旅游和艺术领域的内容并且进行深化。
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