第五章从速度、力度、触键、踏板、装饰音五个方面，较深入地研究了海顿晚期钢琴奏鸣曲的演奏风格。

Fifth chapter from speed, dynamics, touch, pedal, ornament and so on, thoroughly studies performance genre of Haydn's late period piano sonata.

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本文从触键的高度、力度、速度、深度、角度和手指硬度这六方面来将触键问题做一个辩证的阐述。

This paper tries dialectically to explain the problem of key touching when playing piano from the following six aspects: height, strength, speed, Angle and the rigidity of fingers.

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