It has a a really hypnotic backing track that is an absolute delight for the listener.

这首歌有真正的催眠伴奏曲 对听众来说绝对是愉悦的享受

She sang on the backing track.

她是唱和声的。

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。