sphenoid bone
柯林斯词典
1. N the large butterfly-shaped compound bone at the base of the skull, containing a protective depression for the pituitary gland (在头颅底座的)蝶骨
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1. N the large butterfly-shaped compound bone at the base of the skull, containing a protective depression for the pituitary gland (在头颅底座的)蝶骨