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n. 依天然形状磨圆的宝石 | adj. 凸圆形的 ...
n. [植]金鸡纳树皮；金鸡纳树
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... 所属州: WI 名字: Ciochon 姓: Carie ...
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Researchers Russell Ciochon and E Arthur Bettis III, from the University of Iowa, US, believe these climatic cycles may have caused the expansion of open habitats, such as grasslands and steppe.
BBC: 'Peking Man' older than thought
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