"We need a more comprehensive approach and we need therefore a new concordant spanning economic development, strengthening institutions, improved security through deeper cooperation on both counter-terrorism and other issues,"

VOA: standard.2009.05.13

Because the melody changes and not all harmonies are concordant with every note.

由于旋律在不停变化而且不是所有的和弦都和每个音符一致。

耶鲁公开课 - 聆听音乐课程节选