比较高中学生“减负”前后的有关情况。
Senior middle school students were heavily burdened with all kinds of homework. In the past， they spent about 6.5 hours in their classroom a day. At home， it took them 5 hours to finish their homework. So they only got less than 7 hours' sleep. Their free time was only three hours. As a result， their health was badly damaged.
Now the things are getting better. About five hours are spent in class and the time for homework had been reduced two hours. So that they have eight hours' sleep and also two more hours to do whatever they like.