zonular placenta

例句：

1. 1. The doctor performed a biopsy on the patient's zonular placenta to determine the cause of her symptoms.
   医生对患者的子宫颈胎盘进行了活检，以确定她症状的原因。
2. 2. The zonular placenta is responsible for the transfer of nutrients and oxygen to the fetus.
   子宫颈胎盘负责将营养物质和氧气传递给胎儿。
3. 3. The zonular placenta plays a crucial role in the development of the fetus during pregnancy.
   子宫颈胎盘在怀孕期间对胎儿的发展起着至关重要的作用。