trichinae

例句：

1. 1. The trichinae are a type of worm that lives in the ocean.
   三叉虫是一种生活在海洋中的蠕虫。
2. 2. The trichinae is a small, flat creature with three legs.
   三叉虫是一种小型、扁平的生物，有三只腿。
3. 3. The trichinae is an important food source for many marine animals.
   三叉虫是许多海洋动物的重要食物来源。