;Polythelia and polymastia usually occur along the embryonic milk lines extending from the axilla to the groin.
摘要
房
头是位于从腋下到腹股沟的胚胎线上。
Polythelia and polymastia usually occur along the embryonic milk lines extending from the axilla to the groin.
摘要房头是位于从腋下到腹股沟的胚胎线上。
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