The opening hours of the Children's Paradise are 8:00-18:00. Xiaojun enters the Children's Paradise at 4:00 p.m., how many hours can he play in the Children's Paradise at most?
儿童乐园的开放时间是8：00-18：00，小军下午4时进入儿童乐园游玩，他在儿童乐园最多可以玩多少小时．
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