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- The modified blastula that is characteristic of placental mammals. 胚泡转化的囊胚，为胎盘哺乳动物的特征
- All mammals except monotremes and marsupials are placental mammals. 除了单孔类动物和有袋动物之外所有的哺乳动物都是有胎盘的哺乳动物。
- Of or belonging to the infraclass Eutheria, a division of mammals to which all the placental mammals belong. 真哺乳亚纲的关于或属于哺乳动物真兽亚纲的一个下纲，包括有胎盘哺乳动物
- Of or belonging to the infraclass Eutheria,a division of mammals to which all the placental mammals belong. 真哺乳亚纲的关于或属于哺乳动物真兽亚纲的一个下纲，包括有胎盘哺乳动物
- Sloths and their relatives branched off from all other placental mammals about 100 million years ago. 树懒及其亲缘大约在一亿年前与其它的胎盘哺乳动物分道扬镳。
- The outer membrane enclosing the embryo in reptiles,birds,and mammals.In placental mammals it contributes to the development of the placenta. 绒毛膜在爬行类动物、鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关
- The outer membrane enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta. 绒毛膜在爬行类动物、鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关
- Of, belonging to, or designating the geologic time, rock series, and sedimentary deposits of the first epoch of the Tertiary Period, preceding the Eocene Epoch and characterized by the appearance of placental mammals. 古新代的属于或是地质时代、岩系的段和沉积矿床第三纪的第一时代的，早于始新世时代并且以胎生哺乳动物的出现为特征
- any placental mammal of the order Primates; 灵长目中有胎盘的哺乳动物；
- 6.any placental mammal of the order Primates; 灵长目中有胎盘的哺乳动物；
- placental mammals having hooves with an odd number of toes on each foot. 有蹄有胎盘的哺乳动物，每只脚上有奇数个脚趾。
- placental mammals having hooves with an odd number of toes on each foot 有蹄有胎盘的哺乳动物，每只脚上有奇数个脚趾
- commonly conceded to be ancestral to marsupial and placental mammals. 普遍认为是有袋动物和有胎盘哺乳动物的祖先。
- A whale is no less a mammal than a horse is. 鲸鱼和马一样都是哺乳动物。
- The whale is the largest mammal in creation. 鲸是世上最大的哺乳类动物。
- any placental mammal of the order Primates; has good eyesight and flexible hands and feet. 灵长目中有胎盘的哺乳动物；视力好，手、脚灵活。
- A corresponding organ in other mammals. 胸脯其它哺乳动物的相应器官
- Formation of a placenta in the uterus. 胎盘形成胎盘在子宫中的形成过程
- placental mammal having hooves with an even number of functional toes on each foot. 每只脚上有偶数个起作用脚趾的有胎盘的哺乳动物。
- young of various large placental mammals e.g. whale or giraffe or elephant or buffalo. 多种有胎盘哺乳动物如鲸、长颈鹿、象或水牛的幼儿。
