纤毛虫纲

例句：

1. 1. The study of ciliates is important for understanding the structure and function of aquatic ecosystems.
   研究纤毛虫对于理解水生生态系统的结构与功能至关重要。
2. 2. Ciliates are microscopic organisms that live in water and on surfaces.
   纤毛虫是生活在水和表面的微小生物。
3. 3. In this research paper, we will explore the diversity of ciliates in different environments.
   在这篇论文中，我们将探索不同环境中纤毛虫的多样性。