When you lift the heel of your hand from the desktop to make a larger move, you use the gross motor skills of the muscles in your arm.

放下手掌将光标从一个地方移到另一个地方，这时你使用的是手指肌肉的精细运动技能。

youdao

When you lift the heel of your hand from the desktop to make a larger move, you use the gross motor skills of the muscles in your arm.

放下手掌将光标从一个地方移到另一个地方，这时你使用的是手指肌肉的精细运动技能。

youdao