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。”
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."
希尔文•马特尔和他在加拿大蒙特利尔理工大学纳米机器人实验室的同事们也使用磁场，但方式不同。
Sylvain Martel and his colleagues at the NanoRobotics Laboratory at Ecole Polytechnique de Montréal in Canada are also using magnetic fields, but in a different way.
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