She sang on the backing track.

她是唱和声的。

《牛津词典》

One investor who is low profile but has a great track record always insists on backing first-time entrepreneurs.

有一名投资者姿态低调却履历出众，他总是不懈地支持初次创业者。

youdao

Monitoring can be switched to listen to your recording signal against your backing track without incurring off-putting latency introduced by your music software.

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In particular, "Free as a Bird, " which features new backing track and vocals from Paul McCartney, George Harrison and Ringo Starr, has drawn scathing reviews.

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Ashlee Simpson was outed during a 2004 Saturday Night Live performance when her backing track played a song different from the one she was singing.

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