1. You should make a copy of the disk as a backup.
你应该将磁盘复制一个备份。
《牛津词典》
2. If that happens, the grasshopper has a backup defense.
如果发生这种情况,蚱蜢就有了后备防御。
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3. In areas where the wind dies down, backup electricity from a utility company or from an energy storage system becomes necessary.
在风能不稳定的一些地区,需要供电事业公司或者能量储存系统来提供备用电能。
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4. The hydrogen gas could then be fed into a storage system and used to generate electricity when additional or backup power is needed.
然后可以将氢气输入到存储系统中,并在需要附加或备用电源时用于发电。
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5. Backup power could also be provided by linking wind farms with a solar cell, with conventional or pumped-storage hydropower, or with efficient natural-gas-burning turbines.
将风力发电厂与太阳能电池、常规或抽水蓄能的水电或高效的天然气涡轮机连接起来,也可以提供备用电力。
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6. Although many of these storage media have high capacity, a backup tool with compression capabilities is a big plus, eliminating the inconvenience of multiple disks or large uploads.