unavailable device [计] 不可用设备
OS can recover from disk read, device unavailable, transient write failures.
操作系统可以恢复磁盘读，设备无效，暂时的失败。
We may be able to help you more if you provide more details about that unavailable device.
我们可以帮助你更多的如果你提供更多细节，不可用的设备。
The invention relates to a voice monitoring method, in particular to a voice monitor in the case of long distance and unavailable arrangement of a voice pickup device.
本发明涉及一种语音监听方法，特别是指在远距离并无法在目标处放置拾音装置的语音监听。
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