transpose
/trænˈspəuz; træns`poz/ v
1 [Tn] cause (two or more things) to change places 使（物体）互换位置
Two letters were accidentally transposed, and `hand' got printed as `hnad'. 有两个字母颠倒了, hand 印成了 hnad.
2 [Tn, Tn.pr, Tn.p]
~ sth (up/down) (from sth) (into/to sth) (music 音) rewrite or play (a piece of music) in a different key 使（乐曲）变调
transposing the song down to D minor 把这首歌曲降为 D 小调.