这说明虽经几千年地下埋藏，古象牙碳羟磷灰石晶体结构不仅没有破坏，而且结晶度还有所提高。
These results show that the crystallinity of the ancient ivory was higher although it had been buried for several thousand years.
这说明虽经几千年地下埋藏，古象牙碳羟磷灰石晶体结构不仅没有破坏，而且结晶度还有所提高。
These results show that the crystallinity of the ancient ivory was higher although it had been buried for several thousand years.
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