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Main Compositions: lactic-peppermint, lavendar essence, witch hazel, modified allantois.

脂,熏衣草华、金缕梅、囊。

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PBS地球-动物趣闻

But the placenta -- the organ that provides material to the embryo from the mother -- is actually formed from the chorion and allantois membranes of the egg.

胎盘——为母亲的胚胎提供物质的器官——卵子的绒毛膜和尿囊膜形成的。

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PBS地球-动物趣闻

Because, the main membranes of an amniotic egg -- known as the sac, the chorion, and the allantois -- are all present in animals that give birth to live young.

因为,羊膜卵的主要膜——被称为囊、绒毛膜和尿囊——都存在于生下活幼仔的动物身

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3G, 401(K), a,
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