Cestoda

例句：

1. 1. The parasite is causing the host to suffer greatly.
   这种寄生虫正在使宿主遭受极大的痛苦。
2. 2. Parasites can be found in many different environments.
   寄生生物可以在许多不同的环境中找到。
3. 3.The parasite was discovered by accident during a medical examination.
   这个寄生虫是在一次医疗检查中偶然发现的。