holometabolous development

例句：

1. 1. The larva undergoes a holometabolous development before pupation.
   幼虫在化蛹前经历了变态发育。
2. 2. During the holometabolous development stage, the caterpillar undergoes significant changes in morphology and behavior.
   变态发育阶段，蚕蛾在形态和行为上发生了显著变化。
3. 3. The study of holometabolous development is crucial for understanding the life cycle of many insects.
   变态发育的研究对于理解许多昆虫的生活周期至关重要。