marsupial

The study sheds light on the genetic differences between placental and marsupial mammals.

这一研究让人了解胎盘哺乳动物和有袋哺乳动物在基因上的差异。

Marsupials include koalas, possums, and kangaroos.

有袋目动物包括树袋熊、袋貂和袋鼠。