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。

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In contrast, they observed no enlargement of the areas of the cortex that handle inputs from the right hand, which controls the bow and requires no special finger movements.

相比之下，他们没有在其接收右手感觉输入的皮质区发现增大的区域，而右手只是控制琴弓不需要特殊的手指运动。

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In contrast, they observed no enlargement of the areas of the cortex that handle inputs from the right hand, which controls the bow and requires no special finger movements.

相比之下，他们没有在其接收右手感觉输入的皮质区发现增大的区域，而右手只是控制琴弓不需要特殊的手指运动。

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