一爵士固定音型；通常为一独奏即席创作提供背景。
A jazz ostinato; usually provides a background for a solo improvisation.
板胡的旋律轻松愉快，小提琴的固定音型好象扁担上下忽闪的弹性动作，展现了一幅优美的乡间画面。
The beautiful country scenery is illustrated by the light-hearted and happy tune of banhu while the fixed sound pattern of violin imitates the elastic movement of the pole on his shoulder.
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