unison
/ˈju:nɪsn, ˈju:nɪzn; `junəsn, `junəzn/ n
(idm 习语) in unison (with sb/sth)
(a) sounding or singing together the same musical note (or the same note in different octaves) （同音或八度同音的）齐奏, 齐唱
The last verse will be sung in unison. 歌词的最後部分要齐唱.
(b) (fig fml 比喻, 文) acting together in close association or agreement 一致的或协调的行动
The banks have acted in unison with the building societies in lowering interest rates. 银行降低了利率来配合房屋建筑协会的行动.