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.
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.
在哺乳动物身上，位于鼻部的神经细胞运用特殊的气味感受器探测气味，并将信息传输给嗅球——嗅觉的整合中枢。
In mammals, neurons located in the nose detect scents using special odor receptors, and shuttle the information to the olfactory bulb, which is the integration center for smell.
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