摩擦痕迹显示他们曾经是项链或手镯的一部分。
Friction marks indicated that they did, indeed, once form part of a necklace or bracelet.
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.
雄鹿摩擦都有一种由雄鹿前额上的腺体产生的气味，这种气味在制造擦痕时就涂抹到了树上。
Buck rubs also have a scent produced by glands in the foreheads of deer that is transferred to the tree when the rub is made.
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