pupae

例句：

1. 1. The caterpillars are the larvae of butterflies.
   蝴蝶的毛虫是它们的幼虫。
2. 2. The cocoon is a pupa waiting to emerge as an adult moth.
   茧是一个蛹，等待变成成蛾。
3. 3. During their development, caterpillars transform into pupae before emerging as adults.
   在发育过程中，毛毛虫会变成蛹，然后变成成虫。