The codes—which typically range in price from $80 to $155 per course—give students online access to systems developed by education companies like McGraw Hill and Pearson.
这些访问码的价格通常在每门课程80美元到155美元之间不等，学生需要通过这些访问码才能在线使用麦格劳·希尔和培生等教育公司开发的系统。
McGraw Hill, which controls 21% of the higher education market, reported in March that its digital content sales exceeded print sales for the first time in 2015.
控制着21%高等教育市场的麦格劳·希尔在3月里的报告称，其数字内容销售额在2015年首次超过了纸质。
McGraw Hill didn't respond to a request for comment, but its CEO David Levin told the Financial Times in August that "in higher education, the era of the printed textbook is now over.
麦格劳·希尔没有回应记者的置评请求，但其首席执行官戴维·莱文在8月份告诉英国《金融时报》：“在高等教育领域，纸质版教科书的时代已经结束。”
McGraw Hill didn't respond to a request for comment, but its CEO David Levin told the Financial Times in August that "in higher education, the era of the printed textbook is now over."
麦格劳·希尔公司没有对评论的请求给出回应，但其首席执行官戴维·莱文在8月份告诉《金融时报》：“在高等教育领域，印刷教材的时代已经结束。”
Research from the University of North Carolina School of Medicine, Chapel Hill, USA, suggests that parent education programmes should be considered worldwide.
来自美国查普希尔北卡罗莱纳大学医学院的研究建议，应在全世界范围考虑父母教育方案。
"This is part of a trend that we're seeing across education," says Hill.
这是趋势之一，我们从教育中就可以看出端倪。
It might be weapons systems, education statistics or the history of Caucasian hill tribes.
有可能是武器系统，教育统计学或者高加索山区部落的历史。
It might be weapons systems, education statistics or the history of Caucasian hill tribes.
有可能是武器系统，教育统计学或者高加索山区部落的历史。
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