根据加州大学伯克利分校的教授约翰·库比亚托维兹所说，下载满容的电子书阅览器与空的阅览器相比，差距仅有1微微微克，也就是10-18 克（十的负十八次方克）。
According to John Kubiatowicz, from the University of California, Berkeley, the difference between an empty e-reader and a full one is just one attogram, or 10-18 of a gram.
安东尼·t·珂容曼(Anthony t . Kronman)，一位耶鲁大学的法学教授，《教育的终结：为什么我们的学院和大学已然放弃了生活的意义》一书的作者，作了进一步的阐述。
Anthony T. Kronman, a professor of law at Yale and the author of "Education's End: Why Our Colleges and Universities Have Given Up on the Meaning of Life," goes further.
首尔东国大学教授金容铉(Kim Yong - hyun)认为克林顿的这次访问有两个目的：使女记者获释以及改善两国关系。
Kim Yong-hyun, a professor at Seoul's Dongguk University, said Bill Clinton's visit could serve two purposes: securing the women's release and improving ties between the two countries.
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