Second, because only male deer rub, the buck rub and its associated chemicals indicate the sex of the deer producing the rub.
第二，因为只有雄鹿会做出摩擦动作，摩擦动作和与之相关的化学物质表明了制造擦痕的鹿的性别。
Second, because only male deer rub, the buck rub and its associated chemicals indicate the sex of the deer producing the rub.
第二，因为只有雄鹿会做出摩擦动作，摩擦动作和与之相关的化学物质表明了制造擦痕的鹿的性别。
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