Marsupialia

例句：

1. 1.The Marsupialia is a type of mammal that lives in Australia.
   袋鼠是一种生活在澳大利亚的哺乳动物。
2. 2.The Marsupialia has a unique adaptation for living in the harsh environment of Australia.
   袋鼠具有适应澳大利亚恶劣环境的独特的适应性。
3. 3. The Marsupialia plays an important role in maintaining the ecosystem of Australia.
   袋鼠在维持澳大利亚生态系统中起着重要的作用。