n.支持；背衬；伴奏
动词back的现在分词.
The cardboard backing was just a strengthener. 这个纸板衬背就是一个助力器。
She had toured as a backing musician for a rock star. 她曾以某摇滚歌星伴奏乐师的身分巡回演出。
adj.在肩(背)上；骑在肩(背)上
adv.在肩(背)上地；骑在肩(背)上地
n.背负式运输
vt.背；附带发生
=pickaback.
背衬木
