他们的癌症与接触辐射并没有太明显的联系。
Their cancers are not so clearly tied to radiation exposure.
就连哈佛大学的研究也没有证明两者之间有直接的联系，但指出了这种接触与行为问题风险之间的强烈关联。
Even the Harvard study did not prove a direct correlation but noted strong associations between exposure and risk of behavioral issues.
毫无疑问，几乎每个与网络接触的人都很难与网络断开联系。
There's little doubt that nearly everyone who comes in contact with the Net has difficulty disconnecting.
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