学习乐器演奏是一项长期而艰苦的活动。按照波浪式前进、螺旋式上升的学习规律来说,在长期学琴的过程中,某一段时间学习状态不佳,进步慢、错误多、缺乏表现力等现象都是正常的现象。但 Learning to play musical instruments is a long-term and painstaking activity. According to the law of wave-forward and spiral-rising, it is a normal phenomenon that, during the long-term learning of the piano, the state of learning is poor, the progress is slow, errors are more frequent, the expression of lack of expressiveness is certain. but