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软骨硬鳞鱼类
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软骨硬鳞鱼类
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理学
有颌类
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chondrostei (fossil)
软骨硬鳞鱼类(化石)
一类以鲟形类(Acipenseriforme,包括现生鲟科和匙吻鲟科构成的鲟类或鲟超科及其化石近亲)为代表的较原始的辐鳍鱼类,有时还可包括与鲟形类亲缘关系较近的、已灭绝的比耶鱼类和龙鱼类。
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overvoltage calculation of electric power system
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overweight and obesity in childhood
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overwhelming joy impairing heart
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