Don't just is ChangeNOW Protected, it's rapid and economical. It is more secure than most centralized copyright exchanges since it doesn't keep the resources. 这里多说一句，苹果其实强调过，一些application在后台不老实，是会被强杀的。其实很多人遇到的杀后台严重问题，很多时候都是因为在使用流氓application啊！还有更重要的信息，那就是任何时候都没必要主动关闭application，这只会导致后续启动app... https://case-study-writing-servic71112.wssblogs.com/35740613/detailed-notes-on-hbr-case-solution