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关注：1
2013-05-23 12:21
求翻译：Most of us, however, don’t get the sleep we need. According to the 2002 National Sleep Foundation, Americans sleep an average of 6.9 hours per night during the week, and 58 percent of adults experience symptoms of insomnia a few nights a week or more.是什么意思？ 待解决
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- 离问题结束还有
Most of us, however, don’t get the sleep we need. According to the 2002 National Sleep Foundation, Americans sleep an average of 6.9 hours per night during the week, and 58 percent of adults experience symptoms of insomnia a few nights a week or more.
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