By the time Apple released the device in early April, the system was ready, hesaid.
正是由于抢占了先机，在苹果公司正式在4月上旬发布iPad时，相应的系统也研发完毕。
Not ready error reading device. Abort, Retry, Ignore?
读取装置没有准备就绪错误。放弃，再试，忽略？
System error 21 has occurred - The device is not ready.
系统错误21日发生了-该装置没有准备好。
System error 21 has occurred - The device is not ready.
系统错误21日发生了-该装置没有准备好。
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