滴虫类原生动物

例句：

1. 1. The parasitesinfect the human body and cause diseases.
   这些寄生虫感染人体并引发疾病。
2. 2. The doctortreated the patient with antibiotics to eliminatethe parasites.
   医生用抗生素治疗病人以消除寄生虫。
3. 3. Parasites can be foundin many different environments, including water andsoil.
   寄生虫可以在许多不同的环境中发现，包括水和土壤。