embryo cap

例句：

1. 1. The embryonic cap is aprotective covering that covers the developing embryo.
   胚胎帽是覆盖发育中的胚胎的保护层。
2. 2. Duringearly development, the embryonic cap helpsto protect the developing brain and spinal cord.
   在早期发育过程中，胚胎帽有助于保护正在发育的大脑和脊髓。
3. 3. The embryoniccap plays a crucial role in the formationof the nervous system during fetal development.
   胚胎帽在胎儿发育期间形成神经系统的过程中起着至关重要的作用。