动物有寄生虫或携带各种各样的病毒。一旦传染给人类，这将会是非常麻烦的事。

Animals have parasites or carry a variety of viruses. Once transmitted to humans, it would be a very troublesome thing.

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全球四分之一的儿童有寄生虫。

One quarter of the world's children have worms.

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医生检查病人的内脏看是否有寄生虫。

The doctors examined the entrails of the patient for parasites.

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There's a parasite known as toxoplasmosis that lives in the bodies of rats.

有一种叫做弓浆虫的寄生虫,寄生在老鼠体内。

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