100. News-Youngsters lack of sleep

词汇

1.     lack 缺乏，不足

2.     worsen （使）恶化

3.     youngster 青少年

4.     average 平均

5.     advise 建议

Youngsters lack of sleep

Lack of sleep among children and teenagers in China has worsened in the past 10 years. About 80% of children don’t have enough sleep on school days. Chinese youngsters sleep for 7.8 hours a day on average in 2020. 

But experts advise primary school students to sleep for at least 10 hours at night. 9 hours is suggested for junior high school students and 8 hours for senior high school students. If youngsters don’t have enough sleeping time, it will do harm to their health.