noun 下载 🔗分享 合弓纲动物 Any animal (including all mammals) of the class Synapsida. Examples : "Paleontologists studying early mammal evolution classify the ancient Dimetrodon as a synapsid, a group distinguished by a single opening in the skull behind the eye. " 研究早期哺乳动物进化的古生物学家将古代的二齿兽归为合弓纲动物，合弓纲动物的特点是眼睛后方的头骨上有一个单独的孔。 animal biology organism anatomy 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 合弓纲的，单孔亚纲的 Pertaining to the class Synapsida, of animals which have an opening low in the skull roof behind each eye, leaving a bony arch beneath each. Examples : "The paleontologist explained that the fossil skull exhibited a synapsid characteristic: a single opening behind each eye socket. " 古生物学家解释说，这块化石头骨显示出合弓纲动物的特征：每个眼眶后方都有一个单独的孔。 anatomy biology animal organism science 与AI对话词汇游戏阅读练习
