noun🔗Share海牛，儒艮 Any of a group of aquatic, herbivorous mammals, of the order Sirenia, including the manatees and dugong."The marine biologist showed the students pictures of a manatee and a dugong, explaining that both are types of sirenian. "这位海洋生物学家给学生们看了海牛和儒艮的图片，并解释说它们都属于海牛目动物。animalbiologyorganismenvironmentoceannatureChat with AIVocabulary GamePractice Reading
