[2008-07-23 16:41]--Teenagers need nine hours of sleep a night and parents can help by getting them back on a school sleep schedule before classes begin, researchers suggest.
研究人员日前指出，中学生每天需要九个小时的睡眠，在开学之前，家长们要帮助孩子逐渐回到上学时的作息时间上来。
Classes don't begin until Monday morning, and this is Saturday night.
现在是星期六的晚上，而我要到星期一早上才开始上课。
Classes don't begin until Monday morning, and this is Saturday night.
现在是星期六的晚上，而我要到星期一早上才开始上课。
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