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IP:5.188.*.* 于 2017-03-11 16:11 评论道：
If you're running an A/B test in Google Analytics (the 'content - exs3#imentp&re9; section), doesn't Google already know about the original and alternative versions of a page in the experiment and is smart enough not to index both? In this case, do you need to use rel= canonical?
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