red worm

例句：

1. 1.The red worms were swimming in the river.
   红虫在河里游动。
2. 2.The red worms are a common sight in the forest.
   红虫是森林中常见的景象。
3. 3. Red worms are an important food source for some animals.
   红虫对某些动物来说是重要的食物来源。