在本文中，假设您已经添加了一个新的硬盘设备或具有备用的硬盘设备或分区，以用作目录或文件系统的移动目标。
Throughout this article, I assume that you have already added a new hard disk device, or have a spare disk device or partition to use as the destination for the directory or file system.
同样不需要为多个系统储备许多备用部件，只需为一个单一平台留有备件即可。
Also, rather than needing to stock replacement parts for multiple systems, only spares for a single platform are required.
所有最主要的系统有备用的消毒系统。
Back-up disinfection system is available for all primary systems.
此系统对阳光有很强的依赖性，对于一些极端的工程或地区，需备有备用人工光源。
The system is heavily reliant on the availability of sunlight, and for critical tasks or areas a back-up artificial light source is required.
整个工厂需安装有足够的紧急照明系统(带有备用电池)。
Adequate emergency lighting (with a battery back-up) should be installed throughout the factory.
运用泛函分析的方法 ，通过分析系统主算子的谱特征 ，给出一类具有备用部件的可修人机系统解的渐近稳定性证明 。
By using functional method, the asymptotic stabitity of a solution of a repairable standby human-machine system is proved, by studing spectral properties of the operator corresponding to this system.
这家医院装有备用发电系统以防灯火管制。
The hospital has an auxiliary power system in case of blackout.
然后海啸来了，比设计制造电厂时估计的情况糟糕很多，海啸干掉了所有备用发电系统。
Then the Tsunami came much bigger than people had expected when building the power plant (see above factor 7). The tsunami took out all multiple sets of backup Diesel generators.
然后海啸来了，比设计制造电厂时估计的情况糟糕很多，海啸干掉了所有备用发电系统。
Then the Tsunami came much bigger than people had expected when building the power plant (see above factor 7). The tsunami took out all multiple sets of backup Diesel generators.
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