拇指按弦是低音弦乐器特有的演奏技法 ,是大提琴演奏和教学的一个重要环节。拇指在承担按音的同时 ,对演奏拇指把位时的整个左手手型 ,手指位置和手指独立性、灵活性都起着关键的作用。由于生理原因和持琴方式 ,拇指只能用侧面按弦 ,所以与其它手指相比 ,具有特殊性。怎样使拇 The thumb string is a unique technique of bass stringed instruments and is an important part of the cello playing and teaching. The thumb plays a key role in accompaniment to pressing the sound, while playing the entire left hand, position and finger independence, and flexibility of the thumb position. Due to physiological reasons and the way of holding the piano, the thumb can only be pressed on the side, so it has particularity compared with other fingers. How to make the thumb