这个练习训练你的身体作出好的转体动作。

This drill helps train your body to have good rotation.

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本文借助15段的人体模型，使用多刚体动力学的方法建立起航天员转体动作的力学模型。

By using a body model of 15 segments and dynamics of rigid bodies, the astronaut's self rotation is modeled.

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肩上扛着3米长的矛做出敏捷的转体动作或握着弓拿着松松垮垮的一袋箭摆出敬礼的姿势都很不容易。

It is not easy to pivot briskly with a three-metre-long spear on one’s shoulder or to present arms with a bow and a loose bundle of arrows.

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