House Speaker Nancy Pelosi made a final pitch for the bill, saying the president's economic agenda is at stake.

VOA: standard.2010.03.22

Here for example we have the pitch C and either note above or below it is dissonant.

如果说这里用C音，那么不管是和它上面还是下面的音符搭配都不和谐。

耶鲁公开课 - 聆听音乐课程节选