蝶蛹的

例句：

1. 1. The butterfly cocoon is a crucial stage in its life cycle.
   蝴蝶的蛹是其生命周期中的关键阶段。
2. 2. The caterpillar's transformation into a butterfly is a fascinating process.
   毛毛虫变成蝴蝶的过程令人着迷。
3. 3. During the pupation stage, the caterpillar transforms into a cocoon.
   在蛹期，毛毛虫会转变成蛹。