摘 要: | "Screen time"is a term used for activities done in front of a screen,such as watching TV,working on a computer,or playing video games.Screen time is sedentary~1 activity,meaning you are being physically inactive while sitting down.Very little energy is used during screen time.“屏幕时间”指的是在屏幕前的活动,例如看电视、电脑办公或者玩视频游戏。屏幕时间是久坐的活动,意味着你坐下来的时候体能是不活跃的,屏幕时间体能消耗得极少。Most American children spend about 3 hours a day watching TV.Added together,all types of screen time can total 5 to 7 hours a day.
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