寄生虫

In a sentence

• 这种鸟最喜欢寄生虫的食物。

  This type of bird most enjoys parasite food.

  Here, '寄生虫' (parasite) is used to describe organisms that thrive by living off other hosts.

• 他被称为社会的寄生虫，因为他不工作也不贡献。

  He is called a parasite of society because he neither works nor contributes.

  In this sentence, '寄生虫' is metaphorically used to describe someone who exploits resources without contributing in return.

• 研究寄生虫对于了解生态系统至关重要。

  Studying parasites is crucial for understanding ecosystems.

  Here, '寄生虫' is mentioned in a scientific context, referring to organisms that play specific roles in ecology.