zonular placenta

• 环形胎盘,环状胎盘

zonular placenta的用法和样例：

例句

1. Earlier studies linked the placenta to the disease.
   早期的研究认为，该病与胎盘有关。
2. Methamphetamine passes through the placenta and is secreted in the breast milk.
   甲基苯丙胺通过胎盘分泌在母乳中。