paraschist

例句：

1. 1.The parasitism of the parasite on the host is a fascinating biological phenomenon.
   这种寄生虫对宿主的寄生现象是一个引人入胜的生物学现象。
2. 2. Parasitism can lead to serious health problems in humans and animals.
   寄生虫病会导致人类和动物严重的健康问题。
3. 3. Researchers are studying the effects of parasitism on the environment.
   研究人员正在研究寄生虫对环境的影响。