经过八周的实验，相比较于第二组暴露在自然光——黑暗循环下的老鼠，第一组和第三组的老鼠体重的增长幅度高出50个百分点。
Over the eight-week period of the experiment the mice inthe first and third groups gained almost 50% more weight than those exposed tothe natural light-dark cycle.
距离我第二个澳大利亚铁人赛已经过去八周了，在比赛中我取得了11小时58分的成绩，比我今年早些时候的成绩快了15分钟。
It has been eight weeks since I finished my second Ironman Australia triathlon in 11 hours and 58 minutes, which was 15 minutes faster than the year earlier.
经过七到八周充足的睡眠后，球员在短期培训赛跑中跑得更快。在白天他们也不会感到困。
After seven to eight weeks of more sleep, the players ran faster in short training RACES. They also felt less sleepy during the day.
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