Backup
01
增援, 支持
the act of providing assistance or support to someone or something
例子
The soldier was relieved to see backup arrive just in time.
士兵看到援军及时赶到，松了一口气。
We had to call for backup when the situation became too dangerous.
当情况变得太危险时，我们不得不呼叫支援。
02
备份, 后备副本
(computing) a copy of computer data that can be used to restore lost or damaged data
例子
It 's important to create regular backups of your files to prevent data loss in case of a computer crash.
为了防止电脑崩溃时数据丢失，定期创建文件的备份很重要。
The system automatically creates daily backups of the database to ensure that no data is lost in the event of a failure.
系统自动创建数据库的每日备份，以确保在发生故障时不会丢失任何数据。
03
a secondary musical part, vocal or instrumental, that supports or complements the main melody
例子
The singer was joined by a trio of backup vocalists.
The backup harmonies added depth to the performance.
04
替补, 后备
a person who is available to take over or assist if the original person is unable to perform their duties
例子
The actor could n’t perform, so the backup stepped in for the evening show.
演员无法表演，因此替补在晚场演出中上场。
She served as a backup in case the main speaker could n’t make it to the event.
她作为后备，以防主要演讲者无法参加活动。
05
a buildup or accumulation resulting from an obstruction or blockage
例子
The plumbing backup flooded the basement.
A traffic backup stretched for several kilometers.
to backup
[phrase form: back]
01
备份, 创建备份
to create a duplicate copy of data on a computer or digital device for the purpose of preserving it for future access or recovery
例子
Make sure to back up your documents to an external drive.
确保将您的文档备份到外部驱动器。
He backed up his photos to the cloud before the trip.
他在旅行前将照片备份到了云端。
