高中学生每个学期通常学习四至五科基础课，每节课的上课时间大约每天一个小时。
High school students commonly study four to five basic subjects per semester, each for approximately an hour a day.
保守估计当今手机的使用频率是每天一个半小时，并且天天如此。
A conservative estimate of average mobile phone use now is approximately half an hour a day, seven days a week.
回到实验来：学习冥想的学生团队进行了一个七小时的研讨会，然后必须去进行每天一小时的练习。
Back to the experiment: the group of students who learned to meditate did a 7-hour workshop and then had to practice for an hour each day.
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