1·The police had backup from the army.
警方得到了军方的增援。
—— 《牛津词典》
2·Every part of the system has a backup.
这套系统的每个部分都有备件。
—— 《柯林斯英汉双解大词典》
3·Sharon also sang backup for Barry Manilow.
莎伦还为巴里·马尼洛唱了伴唱。
—— 《柯林斯英汉双解大词典》
4·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》
5·We can use him as a backup if one of the other players drops out.
如果有参赛者退出，我们可以用他作为替补。
—— 《牛津词典》
6·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。
7·Perhaps, similar to sails, they make a useful backup for when the lights go out.
也许，和风帆一样，它们作为备用品可以在熄灯的时候排上用场。
8·And, perhaps, similar to sails, they make a useful backup for when the lights go out.
也许，和帆船一样，它们在熄灯的时候可以作为有用的备用品。
9·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。
10·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。