研究生科技英语阅读课文翻译对照(34)

你是不是只引用发现不良影响的研究报告，不管其影响多么微乎其微？而从来对没发现不良影响的研究视而不见？环境工作小组就在关于手机的报告中引用了许多负面结论，例如：洛杉矶加州大学的一项研究发现胎儿受到手机辐射和长大后的行为问题有关。但这个研究组在下一句中接着又承认这种关系可能“并没有因果关系，而且也许是其他因素共同作用造成的”。
The effects of cell phones have proven difficult to assess because they are relatively new, the way and the amount they’re used continues to evolve, and the problems that cell phones might cause are hard to detect. Brain cancers, for instance, are very rare cancers. They affect only some 18 out of every 100,000 people. But the fact that there’s been no recent increase in the numbers may be meaningless with regard to cell phone use since brain cancers are very slow-growing.
众所周知，手机的影响很难估计。因为手机还是个新鲜事物，人们使用手机的方式和数量也在不断改变，所以这个作用就很难检测。举个例子，脑癌，这是一种很少见的癌症。十万人但中只有18个人可能患脑癌。事实上，最近几年，这个比例并没增长，这说明手机的使用和脑癌并没有因果关系。
Cell phones produce “non-ionizing” radiation, which, unlike X- or gamma rays, doesn’t damage DNA by stripping away electrons from molecules in cell tissue. Radiofrequency energy does, however, produce heat and, at high enough levels, can damage cell tissue. This, in the late 1990s, The question is whether safety standards are sufficient to protect against long-term exposure.prompted the U.S. Federal Communications Commission (FCC) and the International Commission on Non-Ionizing Radiation Protection (ICNIRP) in Europe to set limits on cell phones’ Specific Absorption Rate (SAR) — the measure of the amount of radiofrequency energy a cell phone user absorbs — at, respectively, 1.6 and 2.0 watts per kilogram. The question remains, however, whether these standards are sufficient to protect against long-term exposures and whether the buildup of heat in cell tissues is more damaging where there’s less blood flow to dissipate it, such as the outer ear, brain, skin, or testes.