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最近,美国密执安大学和巴基斯坦地质调查所的联合研究小组,从巴基斯坦4700万年前的地层中发现了一种动物新化石。这种动物新化石是由陆地动物变为水栖动
Recently, a joint research team at the University of Michigan and the Pakistan Geological Survey discovered a new animal fossil from 47 million years ago in Pakistan. The animal’s new fossil has changed from terrestrial to aquatic