set the tune with one beat of the gong—give the final word ? 一切都準(zhǔn)備好了，現(xiàn)在該由你～了。Everything is ready. Now it’s up to you to give the final word.
一錘定音
set the tune with one beat of the gong—say the last word;make the final decision
一錘定音yī chuí dìnɡ yīn
比喻說(shuō)話算數(shù)，講信用；也比喻做事干脆利落。give the final word, set the tune with the one beat of the gone