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18岁勃起多少厘米正常
更新时间: 2020-11-04 00:00:00  

18岁勃起最长为18厘米,最短为7厘米,平均为12.4厘米。

阴茎,又称阳具,生物医学基本术语,指的是高等脊椎动物的外生殖器官。与雌性的阴道一样,它也发育自胚胎时的交接器原基,是性行为时的主要器官。

关键词: 多少 厘米 正常

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