... 部分欧泊化的动物化石 partially-opalized fossil 动物与植物化石 Animal And Plant Fossils 化石动物 zoolite ...
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事实上，含有软体动物的化石层已经被发现很多年了。
In fact, fossil beds containing soft-bodied animals have been known for many years.
我们所说的化石，指的是史前动物的遗迹，如已矿化的骨头，或留在石头上的骨头或器官的印痕。
By fossils, we mean traces of prehistoric animals such as bones, which become mineralized, or impressions of bones or organs that are left in stone.
在较老的湖泊遗址，有河马、水牛的化石遗迹，这些动物一生中大部分时间都站在水里，还有牛的化石。
At older lake sites, there's fossil remains from hippopotamuses, water buffalo, animals that spend much of their lives standing in water, and also, fossils of cattle.
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