成虫

例句：

1. 1. The butterfly's life cycle includes both the egg and the adult stages.
   蝴蝶的生活周期包括卵和成虫阶段。
2. 2. During the larval stage, the caterpillar is covered in a protective cocoon.
   在幼虫阶段，毛虫被一层保护性的茧所覆盖。
3. 3. The larvae of this species feed on plant leaves, which can be harmful to the ecosystem.
   这种物种的幼虫以植物叶子为食，这对生态系统可能是有害的。