很多朊病毒类型的疾病是由同类相食所导致的。

Much prion type diseases can be caused by cannibalism.

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中国历代反复出现的人相食现象就是这一悲惨世界的证据。

Proof of this misery is the cannibalism that recurs in China's history.

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在原始社会里，即使是同类相食的人类，也会令一种大脑疾病遗传下去。

Even human cannibals in primitive societies have a problem with a brain disease passed in this way.

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