n.单细胞生物，原生动物
protozoan的复数

原形：protozoan

Protozoa are unicellular eukaryotic organisms that live in a wide range of environments.
原生动物是生活在多种环境中的单细胞真核生物。
The disease is caused by a protozoan parasite transmitted through contaminated water.
这种疾病是由一种通过受污染水传播的原生动物寄生虫引起的。
Amoebas, belonging to the protozoa group, move by extending their pseudopodia.
属于原生动物门的阿米巴通过伸出伪足来移动。
Protozoa play a vital role in aquatic and soil ecosystems as both predators and prey.
原生动物在水生和土壤生态系统中作为捕食者和猎物发挥着至关重要的作用。
The life cycle of protozoa can involve complex stages including cysts and trophozoites.
原生动物的生活周期可能包括囊肿和滋养体等复杂阶段。
Some protozoa form symbiotic relationships with other organisms, benefiting both parties.
一些原生动物与其他生物形成共生关系，对双方都有利。
Giardia lamblia, a protozoan parasite, is a common cause of waterborne illness worldwide.
蓝氏贾第鞭毛虫，一种原生动物寄生虫，是全球范围内水源性疾病的常见原因。
Researchers study protozoa to understand cell biology and evolution of eukaryotes.
研究人员通过研究原生动物以了解真核细胞生物学和进化。
In aquatic environments, protozoa contribute to nutrient cycling by consuming bacteria and algae.
在水生环境中，原生动物通过消耗细菌和藻类促进了营养物质的循环。
The use of protozoa as biological indicators helps assess water quality in freshwater systems.
使用原生动物作为生物指示剂有助于评估淡水系统的水质。