pupa coarctata

例句：

1. 1. The pupa is the stage of a butterfly before it emerges as an adult.
   蛹是蝴蝶在变成成虫之前的阶段。
2. 2. The caterpillar's chrysalis is where it transforms into a butterfly.
   毛毛虫的茧是它变成蝴蝶的地方。
3. 3.During its larval stage, the caterpillar feeds on leaves and other plant materials.
   毛毛虫在幼虫阶段，以叶子和其他植物材料为食。