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1.An external pouch or fold on the abdomen of most female marsupials, containing the mammary glands and in which the young continue to develop after leaving the uterus.
育儿袋大多数有袋目动物母亲腹前的袋子，内有乳腺，幼仔在离开子宫后在里面继续生长发育收藏指正
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