https://qooah.com/2014/11/03/%e5%82%b3%e5%b0%8f%e7%b1%b3%e5%b0%87%e6%8e%a8%e6%8e%a1%e7%94%a8-64-bit-%e8%99%95%e7%90%86%e5%99%a8%e7%9a%84%e5%bb%89%e5%83%b9%e5%b9%b3%e6%9d%bf%e9%9b%bb%e8%85%a6/