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The hygiene hypothesis has its roots in the theory of evolution, he said.
他说，卫生假说是有进化理论根据的。
youdao
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One explanation for the rise of these two conditions is the hygiene hypothesis.
对于这两种疾病增加，有一个解释是卫生假设。
youdao
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One explanation for the rise of these two conditions is the hygiene hypothesis.
对于这两种疾病增加，有一个解释是卫生假设。
youdao