如果你习惯了在一两个小时之内回复邮件，那么你会担心如果你一天或更长时间不回复，人们将会反对。
If you're used to responding to emails within an hour or two, you might worry that people will object if they don't hear back for a day or more.
美国儿科学会建议把儿童每天看电视电影录像和电子游戏的时间限定在一两个小时范围之内。
The American Academy of Pediatrics recommends limiting a child's use of TV, movies, video and computer games to no more than one or two hours a day. Too much screen time has been linked to.
美国儿科学会建议把儿童每天看电视电影录像和电子游戏的时间限定在一两个小时范围之内。
The American Academy of Pediatrics recommends limiting a child's use of TV, movies, video and computer games to no more than one or two hours a day. Too much screen time has been linked to.
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