placenta materna的用法和樣例：
例句
- The placenta is the organ that unites the mother with the baby and provides air and food.
胎盤(pán)是連接母體和嬰兒的器官，為嬰兒提供氧氣和食物。 - Parturition is defined as the physiologic process by which the pregnant uterus delivers the fetus and placenta from the maternal organism.
分娩的定義是妊娠子宮將胎兒和胎盤(pán)從母體排出的過(guò)程。
