Although the course time in university is longer than that in high school, most students seem to have the problem of "unable to sit still". In class, they can't concentrate on listening to the teacher. They touch their mobile phones every 10 minutes, or go to the toilet, fetch water and secretly eat snacks ... and college courses are not as full as high school courses, so students have more rest time and spend more time on their studies. At this time, we found that our memory seems to have declined and our understanding ability has also regressed. We don't know much about what we learned before the college entrance examination. We used to know astronomy and geography, but we couldn't solve trigonometric functions, memorize the periodic table of elements and understand trigonometric functions.

Second, it is inseparable from mobile phones.

Nowadays, it is more and more common for young people to play mobile phones, especially as college students. They usually have a lot of free time, so it is very sad not to play mobile phones every day. Therefore, many college students keep their mobile phones almost every day. According to the data, college students spend more than five hours playing mobile phones every day on average! These phenomena do not seem to be too big a problem, but actually reflect the sadness of contemporary college students!