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。
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.
首先，擦痕上的化学物质提供了动物的个体特征信息；没有两种哺乳动物会产生相同的气味。
First, the chemicals deposited on the rub provide information on the individual identity of an animal; no two mammals produce the same scent.
这些化学物质就产生了青春期的气味。
粪便的颜色和气味是细菌作用于化学物质的结果。
The colour and odour are produced by Bacterial action on chemical constituents.
这种化学物质或气味的组合还没有找到。
This chemical or combination of smells has not yet been found.
这种化学物质或气味的组合还没有找到。
This chemical or combination of smells has not yet been found.
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