1. The marsupium is a pouch on the belly of a female marsupial where the young are carried and nourished. 奶袋是雌性有袋类动物背腹处的一个囊状物，用来携带和滋养幼崽。

2. The kangaroo mother has a marsupium in which she keeps her joey until it is old enough to survive outside. 袋鼠妈妈有一个奶袋，她在里面抱着小袋鼠，直到它足够大能够在外面生存。