noun🔗Share合弓纲动物 Any animal (including all mammals) of the class Synapsida."While dinosaurs ruled the land, synapsids, the ancestors of mammals, were evolving in the shadows. "当恐龙统治陆地时，合弓纲动物，也就是哺乳动物的祖先，正在阴影中进化。animalbiologyorganismChat with AIVocabulary GamePractice Reading
