New words：

kangaroo [.kæŋgə'ru:] n. 袋鼠
koala [kəu'ɑ:lə] n. 树袋熊；考拉熊；无尾熊

Sample Sentences：

Australia is the hometown of kangaroos.
The mother kangaroo has a special bag for her baby.
There are over 600 animals there, including kangaroos, koalas and crocodiles.

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