promammal

例句：

1. 1. Promammals are the largest and most diverse group of animals on Earth.
   哺乳动物是地球上最大的、最多样化的动物群体。
2. 2. Mammals are characterized by their warm-blooded nature and their ability to give birth to live young.
   哺乳动物以其温血特性和产活体幼崽的能力而著称。
3. 3.The discovery of new mammal species has sparked a renewed interest in paleontology.
   新哺乳动物物种的发现激发了对古生物学的兴趣。