https://qooah.com/2012/09/26/google-%e4%b8%bb%e5%b8%ad%e6%8c%87%e5%87%ba-apple-%e8%87%aa%e5%b7%b1%e5%81%9a%e5%9c%b0%e5%9c%96%e5%be%88%e5%a4%b1%e7%ad%96/