内寄生物

例句：

1. 1. The term "parasite" is often used to describe organisms that live on or within another organism withoutcausing harm.
   “寄生”一词通常用来描述那些在另一种生物体内生活或存在的，不会造成损害的生物。
2. 2.In the field of ecology, parasites are important because they can affect the populations of their hosts.
   在生态学领域，寄生虫很重要，因为它们可以影响它们宿主的种群。
3. 3. Parasites can cause significant damage to their hosts, leading to disease and death.
   寄生虫可以对它们的宿主造成重大损害，导致疾病和死亡。