变奏曲式是最古老的曲式之一，它的起源与民间音乐有密切联系。
The variation is one of the most ancient musical forms , the historical development is glorious .
这部钢琴协奏曲是变奏曲式的作品，全曲共有十四个变奏。
The piano concertos are form of variations , this work has fourteen variations totally .
变奏曲式