Marsupials include koalas, possums, and kangaroos.有袋目动物包括树袋熊、袋貂和袋鼠。Eucalyptus trees can be seen everywhere in Australia. They are the favorite food for koalas.尤加利树在澳洲到处都是，它们是无尾熊最喜欢的食物。The wild population of koalas is in danger of dying out.野生树袋熊濒临灭绝的危险。