和朋友闲逛的时候不要玩手机。
You shouldn't play with your phone when hanging out with your friends.
上课不要玩手机，否则你老师会把它拿走。
Don't play with your mobile phone in class, or your teacher will.
如果你还没满10岁，在任何地方都不要玩手机。
教授警告学生们绝对不要在课堂上玩手机。
The professor warned the students that on no account should they use mobile phones in his class.
教授警告学生们绝对不要在课堂上玩手机。
The professor warned the students that on no account should they use mobile phones in his class.
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