oocyst

例句：

1. 1. The doctor found an unusually large oocyst in her urine sample.
   医生在她的尿样中发现了一个异常大的囊泡。
2. 2. The study focused on the development of oocysts during the larval stage.
   该研究专注于幼虫发育期间囊泡的形成。
3. 3.Oocysts are a type of protozoan that can cause waterborne diseases.
   囊泡是一种原虫，可以引起水传播的疾病。