减少通话次数和通话时间,也能起到预防作用。
Less frequent calls, shorter in duration, should also have some preventative effect.
此外,报告显示并没有证据表明致癌的风险会随着通话次数、时长以及使用手机年限的增加而增加。
In addition, the study revealed no evidence of increasing risk with progressively increasing number of calls, longer call time, or years since beginning cell phone use.
这项研究假设假如两地居民使用电话通话次数越多、时间越长,那么这两地属于同一地区的可能性就越大。
The study's hypothesis was that the more and the longer people in two locations talk on the telephone, the more the places belong to the same region.
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