3 sentences

1. 鸟类和哺乳动物一样，都是热血的。

   niǎo​lèi hé bǔ​rǔ​dòng​wù yī​yàng, dōu shì rè​xuè de.

   Birds, like mammals, are warm-blooded.

   Source: Dong Chinese Dictionary

2. 澳大利亚超过90%的哺乳动物是夜行动物。

   ào​dà​lì​yà chāo​guò90% de bǔ​rǔ​dòng​wù shì yè​xíng​dòng​wù.

   More than 90% of Australia's mammals are nocturnal.

   Source: OpenSubtitles

3. 鲸鱼虽然生活在海洋中，但它们是哺乳动物。

   jīng​yú suī​rán shēng​huó zài hǎi​yáng zhōng, dàn tā​men shì bǔ​rǔ​dòng​wù.

   Although whales live in the ocean, they are mammals.

   Source: Dong Chinese Dictionary