a type of mammal from Australasia or South or Central America which is not completely developed when it is born and is carried around in a pocket on the mother's body where it is fed and protected until it is completely developed
发音
例句
1. Koala is an arboreal Australian marsupial. 考拉是一种澳大利亚树栖有袋动物。 2. The marsupial has been in decline for decades due to urban sprawl, car accidents, dog attacks. 这种有袋动物其数量在过去几十年间逐渐减少,主要原因是城市的扩张、车祸和狗的袭击。