https://qooah.com/2013/07/13/microsoft-%e8%a6%81%e6%b1%82%e7%be%8e%e5%9c%8b%e6%b5%b7%e9%97%9c%e5%9f%b7%e8%a1%8c%e9%87%9d%e5%b0%8d-motorola-%e6%89%8b%e6%a9%9f%e7%a6%81%e4%bb%a4/