The experiment indicates that there exists difference between soft and hard rock during their concretion and settlement.

实验表明，软硬不同的岩体在固结沉陷过程中存在明显差异。

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Except for environment factor, the infection of different types of HCV, there exists difference of genetic susceptibility which can lead to various effects in human population.

除了环境因素即不同类型HCV的感染，人群中确实存在着易感性的差异，从而使他们对HCV感染产生不同的效应。

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If this difference exists, are there others?

如果存在这种区别，是否还有其他区别？

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Or whether there exists an unknown fundamental difference between men who like exercise and those who do not which might account for the findings.

BBC: Prolonged TV viewing linked to lower sperm count