常见例句a family of mammals of order Sirenia including dugongs and Steller's sea cow 哺乳动物中海牛目中一科包括儒艮和斯特勒儒艮a family of mammals of order Sirenia including dugongs and Steller's sea cow. 哺乳动物中海牛目中一科包括儒艮和斯特勒儒艮。 返回 Sirenia