free-swimming ciliata

例句：

1. 1. The free-swimming ciliates are a fascinating groupof organisms.
   自由游泳的纤毛虫是一组令人着迷的生物。
2. 2. Free-swimming ciliatesplay an important role in the ecosystem.
   自由游泳的纤毛虫在生态系统中起着重要作用。
3. 3. In this study, we focused onthe free-swimming ciliates as our main subject.
   在这项研究中，我们主要关注自由游泳的纤毛虫作为我们的研究对象。