One drawback is that children become fixated and immersed in their screen time and reluctant to do exercise, resulting in problems such as obesity.
一个缺点是，孩子们会过分沉溺于电脑屏幕中，不愿意运动，从而导致肥胖等问题。
We are supposed to do exercise once or twice a day to keep healthy.
我们应该每天锻炼一两次以保持健康。
Exercise is great for sleep, but Breus said that it's hard for the body to wind down after doing it. He advises finding an earlier time in the day to do exercise.
锻炼有利于睡眠，但布鲁斯说，如果是刚刚锻炼完，身体很难松弛下来，他建议在一天里找个更早的时间去锻炼。
For those who are fond of sports, summer holiday is a good time to do exercise and keep healthy.
对于喜爱运动的同学来说，暑假是参加体育运动，保持身体健康的好时机。
Another way to manage stress is to do exercise that you enjoy for 20 to 30 minutes, three times a week, to keep fit.
调整压力的另一个方法是做你喜欢的运动以保持健康，每周做三次，每次20到30分钟。
They don't like to do exercise, and they often watch TV for a long time.
他们不喜欢锻炼，经常长时间看电视。
In general, keeping fit needs to do exercise, keep a balance diet and keep a good mood.
总的来说，要保持身体健康就要锻炼，保持均衡饮食和保持一个好心情。
Last but not least, such activities like climbing a mountain provide a good chance to do exercise.
最后但并非最不重要的，像爬山这样的活动为人们提供了一个锻炼的好机会。
For example, teenagers are overloaded, the homework took them a lot of time, and hence they don't have too much time to do exercise.
例如，青少年负担过重，写作业就花了很多时间，因此他们没有多少时间做运动。
For example, teenagers are overloaded, the homework took them a lot of time, and hence they don't have too much time to do exercise.
例如，青少年负担过重，写作业就花了很多时间，因此他们没有多少时间做运动。
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