eutherian mammals兽类哺乳动物
ADJ（形容词） of, relating to, or belonging to the Eutheria, a subclass of mammals all of which have a placenta and reach an advanced state of development before birth. The group includes all mammals except monotremes and marsupials 真哺乳亚纲动物的
N（名词） any eutherian mammal 真哺乳亚纲动物