当旋转双音符时，前臂应放两个内指之间的中心位置。

While rotating double notes, the forearm should be in a central position between the two innermost fingers.

youdao

当旋转双音符时，前臂应放两个内指之间的中心位置。

While rotating double notes, the forearm should be in a central position between the two innermost fingers.

youdao