prototrochal larva

例句：

1. 1. The protozoan larva is a fascinating creature that can live in water for months at a time.
   原核幼虫是一种令人着迷的生物，它可以在水中生活数月。
2. 2.Protists are microscopic organisms that play important roles in ecosystems.
   原生动物是微小的生物，它们在生态系统中扮演着重要的角色。
3. 3. The discovery of new species of protists has led to significant advancements in medical research.
   新物种原生动物的发现，推动了医学研究的显著进步。