这种小型动物的牙齿结构显示它可能是一种类似哺乳动物的爬行动物。

The dental structure of this small creature suggests it may have been a ___mammal-like reptile.

这种爬行动物的哺乳动物般特征包括温血和毛发覆盖。

This reptile has ___mammal-like characteristics including warm blood and fur covering.