backup

The police had backup from the army.

警方得到了军方的增援。

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。

Every part of the system has a backup.

这套系统的每个部分都有备件。

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。

You should make a copy of the disk as a backup.

你应该将磁盘复制一个备份。

They can access email in real time, and take full advantage of services such as internet-based backup or even internet-based phone services.

他们可以实时访问电子邮件，并充分利用基于互联网的备份服务甚至基于互联网的电话服务。

Sharon also sang backup for Barry Manilow.

莎伦还为巴里·马尼洛唱了伴唱。