China has also taken steps to protect the students' eyesight, such as larger printing in students' textbooks, at least two hours' outdoor activities a day, regular eyesight checking, less time on E-books and so on.

中国也采取了措施来保护学生的视力，比如课本上印刷更大的字体、每天至少两个小时的户外活动、定期视力检查、减少看电子书的时间等。

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On this day in 1644 John Milton published his pamphlet, Areopagitica, a Speech for the Liberty of Unlicensed Printing, to the Parliament of England.

1644年的这一天（11月23日），约翰·弥尔顿出版了他的一本小册子，《论出版自由：论未经英格兰议会许可而出版的自由权演讲》。

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My confidence in using Ubuntu is increasing day by day but it is still giving me problems in some areas, notably printing and sound recording. The printers that I have do not have Linux drivers.

我对使用Ubuntu的自信日复一日地增加着，但它在某些方面，主要是打印和录音方面还存在一些问题。

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That has certainly been true of information, which, from the day the printing press was created in Guttenberg, has been on an exponential explosion in terms of diffusion.

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At Cornell University, researchers are experimenting with using 3D printers to print food that could be eaten by astronauts in space, and scientists in Edinburgh successfully 3D-printed embryonic stem cells for the first time, demonstrating how 3D-printing technology could one day eliminate the need for organ donation.

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And desktop 3D printing and scanning is getting cheaper every day -- Canadian company Matterform is developing a lightweight 3D scanner called the Photon that's cheaper than a tablet.

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