String players practice moving the fingers of the left hand up and down, while drawing the bow to and fro with the right arm — two entirely different movements.

弦乐器的演奏者练习的则是在左手的手指上下滑动的同时，用右手前后拉动琴弓——两个截然不同的动作。

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String players practice moving the fingers of the left hand up and down, while drawing the bow to and fro with the right arm-two entirely different movements.

弦乐器的演奏者练习的则是在左手的手指上下滑动的同时，用右手前后拉动琴弓——两个截然不同的动作。

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Ysbrand Van der Werf and his colleagues tracked how well people learned to tap their fingers in a specific sequence-without any practice.

Ysbrand Van der Werf和他的同事们追踪了人们在从未有过练习的情况下学习按特定顺序敲击他们的手指。

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