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Mammals（哺乳动物）Mammals are the world＇s most dominant（最占优势的）animal.They are extremely（非常）diverse（多种多样的）creatures（生物，动物）that include（包括）the biggest ever animal （the blue whale鲸，which eats up to 6 tons every day）,the smallest（leaf-nosed bat小蹄蝠） and the laziest