英语
西班牙语
英语
西班牙语
单语范例（未经PONS编辑处理）
Once in the pouch, it fastens onto one of the four teats and starts to feed.
en.wikipedia.org The gestation period for a pregnant female is around 13 days, with a pouch period of 67 months.
en.wikipedia.org Brood pouches vary significantly among different species of pipefish, but all contain a small opening through which female eggs can be deposited.
en.wikipedia.org The platypus stores their findings in special pouches behind their bill and consumes its prey upon returning to the surface.
en.wikipedia.org The pouch is occupied by special cells called podocytes, which facilitate ultrafiltration of the blood through the partition between haemocoelom and nephridium.
en.wikipedia.org