subchorionic

例句：

1. 1.The placental interface is a critical area for fetal growth and development.
   胎盘界面是胎儿生长和发育的关键区域。
2. 2.The chorionic villi are the primary site of nutrient exchange between mother and fetus.
   绒毛膜是母体与胎儿之间主要的物质交换场所。
3. 3.Villous structures are found in the subchorionic space, providing a rich environment for cell proliferation.
   绒毛结构存在于胎盘下层空间中，为细胞增殖提供了丰富的环境。