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  1. en.wikipedia.org › wiki › MammalMammal - Wikipedia

    4 天前 · Theria. Marsupialia. Placentalia. A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk-producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.

  2. en.wikipedia.org › wiki › OrcaOrca - Wikipedia

    5 天前 · The orca (Orcinus orca), or killer whale, is a toothed whale that is the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus.Orcas are recognizable by their black-and-white patterned body. A cosmopolitan species, they are found in diverse marine environments, from Arctic to Antarctic regions to tropical seas.

  3. en.wikipedia.org › wiki › WomanWoman - Wikipedia

    5 天前 · A woman is an adult female human.[a][2][3] Before adulthood, a woman is referred to as a girl (a female child or adolescent).[4] Typically, women are of the female sex and inherit a pair of X chromosomes, one from each parent, and fertile women are capable of pregnancy and giving birth from puberty until menopause. More generally, sex ...

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