名词
中文翻译：胎盘动物
同义词：
['mammal', 'placental mammal例句：1. Mammals are the only animals that give birth to live young.（哺乳动物是唯一能产活仔的动物。）']
例句：
-
1. Mammals are the only animals that give birth to live young.
哺乳动物是唯一能产活仔的动物。
-
2.The amniotic sac protects the developing fetus inside the uterus.
羊膜囊保护着子宫内的胚胎发育。
-
3.Amniotes are a group of warm-blooded animals that give birth to live young.
胎盘动物是一类产活仔的温血动物。