lambdoidal

例句：

1. 1.The lambdoidal sac is aprotective membrane that surrounds the fetusduring pregnancy.
   羊膜囊是怀孕期间包围胎儿的保护膜。
2. 2. During labor, the amniotic sac expands to providespace for the baby to pass through.
   在分娩过程中，羊膜囊扩张以提供空间让宝宝通过。
3. 3. Theamniotic fluid playsa crucial role in maintaining thehealth of the developing fetus.
   羊水在维持发育中的胎儿健康方面起着至关重要的作用。