acorn worm

例句：

1. 1. The acornworm is a common pest in theforests.
   松毛虫是森林中的常见害虫。
2. 2. The acorn wormeats the seeds of the pin oak tree.
   松毛虫吃松栎树的种子。
3. 3. The acorn wormis an important food source for many animals.
   松毛虫是许多动物的重要食物来源。