encirclage of internal orifice of cervix

例句：

1. 1. The spider's web is a perfect example ofan encirclage.
   蜘蛛网是完美的例子，展示了一个环形圈。
2. 2. Thetree was surrounded by a dense encirclage of leaves.
   这棵树被浓密的叶子包围着。
3. 3. Thecity is encircledby a ring of mountains,forming an encirclage.
   这座城市被一圈山脉环绕，形成了一个环形圈。