那叫二胡，是一种用弓演奏的琴。
摘要：二胡演奏中，运弓的力度是表现音乐情绪，抒发情感的一种技法。
Abstract: erhu performances, Yun arch music performance is the intensity of emotions, a technique to express emotion.
换句话说，二胡的弓不能从弦中离开，除非这两根弦中有一根卸下或断了。
In another word, one cannot take off the bow from the instrument unless one of the two strings is taken off or broken.
从物理分析的视角出发，以力矩平衡原理、弦振规律分别对二胡演奏中的运弓及左手指位进行了分析，定量地讨论分析了“乐感”中的力度和音准问题。
In the musical performance rule of ErHu, how to use bow and finger of left hand is analyzed, that is based on the moment balance principle and bowstring principle.
从物理分析的视角出发，以力矩平衡原理、弦振规律分别对二胡演奏中的运弓及左手指位进行了分析，定量地讨论分析了“乐感”中的力度和音准问题。
In the musical performance rule of ErHu, how to use bow and finger of left hand is analyzed, that is based on the moment balance principle and bowstring principle.
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