Then, he entered the tree hole and went down.

然后，他进入了树洞，慢慢滑下去。

A dozen share this tree hole, but there's plenty of room.

12只鼠狐猴同居此洞，但是空间足够了。

Some animals grow thicker fur, or live in tree holes or underground to stay warm.

有些动物会长出浓密的毛发，或者居住在树洞或地下来保暖。