https://qooah.com/2011/08/16/google-%e6%94%b6%e8%b3%bc-motorola-%e5%be%8c%ef%bc%8c%e4%b8%8b%e4%b8%80%e4%bb%a3-nexus-%e7%9a%84%e8%a3%bd%e9%80%a0%e6%ac%8a%e9%82%84%e8%a6%81%e7%ab%b6%e7%88%ad%ef%bc%9f/