infusorial

例句：

1. 1.The infusoria are microscopic organisms that live in the water.
   浮游生物是生活在水里的微小生物。
2. 2.Infusoria play a crucial role in the ecosystem.
   浮游生物在生态系统中起着至关重要的作用。
3. 3. The study of infusoria has led to new discoveries about the ocean's biodiversity.
   对浮游生物的研究已经揭示了海洋生物多样性的新发现。