aetiolation

例句：

1. 1. The process of aetiolation is crucial for the growth and development of a fetus.
   分娩过程对于胎儿的成长和发育至关重要。
2. 2. During childbirth, the mother's body undergoes a series of physiological changes.
   分娩期间，母亲的身体会经历一系列生理变化。
3. 3. The pain during aetiolation can be intense and last for several hours.
   分娩时的阵痛可能非常剧烈，持续数小时。