英语语法分析

Protozoa are known to be common inhabitants of drinking water.

众所周知原生生物聚居在饮用水中。

The parasites concerned are protozoa belonging to the Trypanosoma genus.

涉及的寄生虫是一种原生动物，归类为锥虫属。

Viruses are already known to infect animals, plants, fungi, protozoa, archaea, and bacteria.

病毒已知感染动物，植物，真菌，原生动物，古菌和细菌。