duplicate version
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以上为机器翻译结果，长、整句建议使用 人工翻译 。
Because women have their sex genes written in duplicate, they always have a second chance of a correct version.
ECONOMIST: Genetics
And I don't have to worry about whether I'm working with the latest version of a document, since I don't have duplicate copies residing on several computers.
CNN: Opinion: Linux doesn't do Windows -- and neither should you
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