f开关告诉命令去自动修理错误，r开关则定位坏的扇区并恢复可读数据。
The f switch tells the command to automatically fix errors and the r switch locates bad sectors and recovers readable data.
是否某些做法对你的iPhone是错误的，你能够要么尝试你自己修理它，要么重启你的iPhone -但是有时候恢复它的出厂设置是唯一真正的修复方法。
If something is wrong with your iPhone, you can either try to fix it yourself, or reset your iPhone - but sometimes restoring it to its factory Settings is the only way of truly fixing it.
制冷设备和热泵。安全和环境要求。第4部分：操作、维护、修理和恢复。
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 4: operation, maintenance, repair and recovery.
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