THE NUMBER ofU.S.Twitter users increased more than 50% in the past year, according to a study from the Pew Research Center. The study found that 13% of online American adults now use the service, compared to the 8% in 2010. The survey, based on telephone interviews of 2,277 adults, also showed that 18- to 29-year-olds use Twitter the most, with 18% reporting that they tweet.
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机译：皮尤研究中心（Pew Research Center）的一项研究显示，过去一年中，美国Twitter用户数量增长了50％以上。研究发现，现在有13％的美国在线成年人使用该服务，而2010年这一比例为8％。该调查基于对2277名成年人的电话访问而得出，该调查还显示18至29岁的成年人使用Twitter最多，有18％的人报告他们发了推文。
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