It represents the status of the Gradus in piano etudes-history.It also analyses the technique and piano language of the Gradus, expounding the style of cantabile and dynamic.

• 本文论述了这套练习曲集在钢琴练习曲发展史上的地位和作用、并通过对其技术以及钢琴语汇的分析，阐述了作品中所表现出的歌唱性与动力性。