After cleaning the outer case, open your screen so that your keyboard is exposed.
在清洗外面的机箱后，打开你的屏幕以让你的键盘出来。
On average, children were exposed to four hours of screen time per day — with 3.6 hours of that time coming from exposures while at home.
平均来说，孩子每日的屏幕时间为四小时——然而，其中3.6小时是在家。
Since adolescents are exposed to considerable screen time - over 4.5 hours on average each day - they’re constantly seeing images of behaviours they can then potentially adopt.
由于青少年接触屏幕的时间太多——平均每天超过4.5小时——他们不断看到许多自己有可能采用的行为形象。
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