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https://boyux.com/2013/04/27/%e7%94%b1-wwdc-%e8%af%b4%e5%bc%80%e5%8e%bb%ef%bc%8cios-%e4%b8%8e-os-x%ef%bc%882%ef%bc%89/
由 WWDC 说开去,iOS 与 OS X(2)