求翻译：但是，它同样也是很累眼睛的，因为一天要上很长时间的课，它还是电子的，指定要比课本累眼睛，所以电子书有好处也有坏处!是什么意思？

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However, it is also very tired eyes, because one day to be a very long time, the lesson of electronics, it is also designated than textbooks, tired eyes, so e-Books are either harm or benefit!

But, it similarly also is tires the eyes very much, because one day wants on the very long time class, it is the electron, assigns to have to tire the eyes compared to the textbook, therefore the electricity classical philosophical works has the advantage also to have the fault!

However, it is also very tired eyes, because for a long time on the day of course, it's electronic, specify than textbook tired eyes, so eBooks there are pros and cons!

正在翻译，请等待...