contraction ring of uterus

例句：

1. 1. The doctor explainedthat the contraction ring of theuterus was causing the pain.
   医生解释说，子宫收缩环引起了疼痛。
2. 2. During labor, the contraction ring of theuterus is responsible for pushing the babyout.
   在分娩过程中，子宫收缩环负责推动婴儿出生。
3. 3. The woman'scontraction ring of the uteruswas so strong that she couldn'twalk without assistance.
   这位妇女的子宫收缩环非常强烈，她走路时需要帮助。