以下为句子列表：
英文: A large feline mammal (Panthera onca) of Central and South America, closely related to the leopard and having a tawny coat spotted with black rosettes.
中文: 美洲虎，一种产自中美及南美地区的大型猫科哺乳动物（美洲虎猫科），与豹有很近的血缘关系，长有黄褐色带黑色花斑的皮毛。
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英文: A mammal having nails or claws.
中文: 有指甲或爪的动物
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英文: A whale is no less a mammal than a horse is.
中文: 鲸鱼和马一样都是哺乳动物。
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英文: According to the mechanism of block of development in vitro culture on early embryo of mammal and in vivo surroundings of early embryo, the paper states that requirement and utilization of nutrients during each cell stage of early embryo of mammal in vitr
中文: 摘要从哺乳动物早期胚胎体外培养发育阻断机理和早期胚胎的体内环境入手，阐述了胚胎体外培养各细胞阶段胚胎对营养物质的需求，寻求合理的体外培养条件和方法，以便提高体外胚胎早期的囊胚发育率。
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英文: Also called duckbill semi aquatic egg-laying mammal native to Tasmania and southern and eastern Australia.
中文: 鸭嘴兽是半水栖卵生哺乳动物,原产于塔斯马尼亚岛和澳洲的南部及东部。
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