These are fetal ear bones.

这些是胎儿的耳骨。

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These are very dense bones, not a soft area of the skeleton.

这些是很致密的骨头，并不是骨架里柔软的部分。

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These buttons are made of bones.

这些钮扣是骨头做的。

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These ancient tools are often found in association with broken animal bones.

这些古代工具经常是与破碎的动物骨头一起被发现的。

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These ancient tools are often found in association with broken animal bones.

这些古代工具经常是与破碎的动物骨头一起被发现的。

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