Merge pull request #4688 from martin2011qi/patch-28

Translating
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runningwater 2016-11-21 23:32:50 +08:00 committed by GitHub
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Martin translating
[
![open source vs closed source](http://www.linuxandubuntu.com/uploads/2/1/1/5/21152474/open-source-vs-closed-source_orig.jpg)
][2]There are many differences between **open source operating system** and **closed source operating system**. Here we have written few of them.