To make the shaft turn, the muscles work in concert, rhythmically contracting, one pair after another.

为了使传动轴转动，所有肌肉必须协调一致，一组接一组有节奏地收缩。

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To make the shaft turn, the muscles work in concert, rhythmically contracting, one pair after another.

为了使传动轴转动，所有肌肉必须协调一致，一组接一组有节奏地收缩。

youdao