无伴奏的英文：
cappela

Bach's unaccompanied cello sonatas.
巴哈的无伴奏大提琴奏呜曲。

A polyphonic composition based on a text of a sacred nature and usually sung without accompaniment.
经文歌一种复调乐曲，以宗教作品的经文为歌词，通常无伴奏演唱

Sing unaccompanied
无伴奏演唱.

An unaccompanied part song scored for three or more male voices that was popular in the18th century.
无伴奏的三部重唱曲无伴奏的三部或多部合唱曲，流行于18世纪。

Once you have sung unaccompanied in front of a roomful of strangers, nothing should faze you.
一旦你能在一屋子的陌生人面前无伴奏地演唱， 就没有什么可担心的了。