某种动物可能对影响人类的疾病有免疫力。

An animal might be immune to a disease that affects humans.

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通常一窝狗中都会有一只有天然的免疫力。

There's usually one pup in a litter that has a sort of natural immunity.

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通常一窝狗中都会有一只有天然的免疫力。

There's usually one pup in a litter that has a sort of natural immunity.

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