•We're going to need some professional backup for this project.要完成这个企划，我们需要一些专业人员的支援。

•The party is going to be outdoors, so we'll need to organize somewhere as a backup in case it rains.晚会将会露天举行，所以我们需要安排一个备用的地方，以防下雨。

•Remember, your colleagues are your backup system when things go wrong.记住，一旦出了差错，你的同事就是你的后备。

•Before we leave work each day, we make a backup of all the records we have entered into the computer that day.每天下班之前，我们都把当天输入电脑的记录备份。

•The department's backup disks are all stored in a different building.该部门的备份磁碟都存放在另一栋大楼内。

•He's a backup for the Dallas Cowboys.他是达拉斯牛仔队的后补球员。