The band was miming to a backing tape.

乐队跟着伴奏带在模拟演唱。

《牛津词典》

But what the crowd didn't realize was that the music they were hearing was a backing tape provided by Melbourne's orchestra (below).

但是人们并不知道他们听到的音乐是来自事先由墨尔本交响乐团(下)录制好的音带。

youdao

If you are backing up to a tape drive (as specified in the Destination section of the General page), the Unload the tape after backup option is active.

如果备份到磁带机(如同“常规”页的“目标”部分指定的一样)，则“备份后卸载磁带”选项处于活动状态。

youdao

Tape is ideal for backing up huge libraries of data -- its fast, cheap and capacious.

FORBES: Serendigity

It competes with IBM, EMC, NetApp, Hewlett-Packard and Hitachi Data Systems in the storage hardware market by selling products like flash drives, magneto-optical drives, magnetic tape drives and compact drives that are used for backing up data on servers.

FORBES: Oracle Has Upside In Hardware But Stock Takes Its Cues From Software Sales

When writers joined they were given a tape recorder for phone calls, to give them crucial backing when they were hauled into court.

ECONOMIST: Jim Michaels