But in a recent BBC poll, two-fifths of those questioned said they did not even know why British forces are in Afghanistan.

VOA: standard.2009.11.10

After the Greeks laid out their fifths and fourths and whole steps, they had these little leftovers.

当希腊人安排好,五度音程,四度音程和全音级后,他们还有一些剩余

耶鲁公开课 - 聆听音乐课程节选

After the Greeks laid out their fifths and fourths and whole steps, they had these little leftovers.

当希腊人安排好,五度音程,四度音程和全音级后,他们还有一些剩余

耶鲁公开课 - 聆听音乐课程节选