Scientists identified a potential link between using mobile phone and a type of brain cancer.
The research team found that the overall evidence was "limited" but felt there was enough evidence of a link to glioma to justify classifying mobile phone use as "possibly carcinogenic to humans". For all other types of cancers the evidence against mobile phone use as a cause of cancer was regarded as being "inadequate" so they were unable to draw any conclusion for them.
However, a lack of evidence could simply mean that mobile phones have not been in widespread use for long enough，for many brain tumors take years to develop.
On gliomas, what's more, they were concerned that the evidence was mounting. The WHO's International Agency for Research on Cancer (IARC) cited a 2004 study which identified a 40 percent increase in the level of risk for people who in the 10 years had used mobile phones for an average of 30 minutes or more every day.
Dr Jonathan Samet, of the University of Southern California, led the group that analyzed the evidence. He accepted that it was "still accumulating" but said: "There could be some risk, and therefore we need to keep a close watch for a link between cellphones and cancer risk."
IARC urged the public to use hands-free devices rather than have phones pressed against their heads, and to send text messages where possible instead of calling.


科学家发现，使用手机与罹患某种脑癌可能存在潜在联系。

研究小组发现，虽然能提供的全面证据依然"有限"，但是现有证据已足以说明使用手机与神经胶质瘤有关，这就证明了使用手机"可能致癌"的结论。至于使用手机能否致使其他癌症，证据还不"不充分"，因此科学家还无法就此给出任何结论。


但证据不充足也可能只是说明手机被广泛普及使用的时间还不够长，因为很多脑瘤的形成也需要很多年。

而就神经胶质瘤的发病而言，证据却是越来越多。世界卫生组织下属机构国际癌症研究署提及了2004年的一项研究，这项研究表明， 10年间平均每天使用手机超过30分钟以上的人群罹患神经胶质瘤几率可能增加４０％。


南加州大学研究员乔纳森•萨梅特博士是这项研究的领导者，他承认相关证据还在"积累过程"中，但他说"致癌风险可能存在，因此我们需要密切关注手机和癌症之间的联系。"


国际癌症研究署提醒民众在通话时应使用免提设备，不要把手机贴在头部，尽可能使用短信替代通话。

• research [ri´sə:tʃ] n.&vi.调查；探究；研究 (初中英语单词)
• cancer [´kænsə] n.癌；毒瘤 (初中英语单词)
• unable [ʌn´eibəl] a.不能的；无能为力的 (初中英语单词)
• conclusion [kən´klu:ʒən] n.结束；结论；推论 (初中英语单词)
• international [,intə´næʃənəl] a.国际的，世界的 (初中英语单词)
• agency [´eidʒənsi] n.代理商；机构；代理 (初中英语单词)
• california [,kæli´fɔ:njə] n.加利福尼亚 (初中英语单词)
• therefore [´ðeəfɔ:] ad.&conj.因此；所以 (初中英语单词)
• potential [pə´tenʃəl] n.&a.潜在的；可能的 (高中英语单词)
• concerned [kən´sə:nd] a.有关的；担心的 (高中英语单词)
• widespread [´waidspred] a.广布的；普遍的 (英语四级单词)