https://qooah.com/2012/07/22/%e8%bc%b8%e6%89%93%e8%b4%8f%e8%a6%81%e7%9a%84-apple-%e4%b8%8d%e6%9c%8d%e8%8b%b1%e5%9c%8b%e6%b3%95%e5%ae%98%e5%88%a4%e6%b1%ba%e5%b0%87%e6%8f%90%e5%87%ba%e4%b8%8a%e8%a8%b4/