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vestigial pelvis /vɛstˈɪbjʊlə ˈnɜːv/ n

中文：退化骨盆

中文 · 退化骨盆Español · pelvis vestigialFrançais · pelvis vestigial
Meaning：Rudimentary bone resulting from the reduction of the pelvis and posterior limbs located in the muscle mass.
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Dolphin skeleton

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