这个练习训练你的身体作出好的转体动作。
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.
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.
破水而出：形如鲨鱼的SeabreacherX潜艇可以以50英里每小时的时速畅游水面，并且能够做出类似海豚的转体动作。
Breaking the waves: the shark-like Seabreacher X can reach surface speeds of 50mph and has the turning style of a dolphin.
跳水求娴熟的起跳，紧着是在空中向前或身后翻筋斗，直体、屈体或团身转体，如果动作完成顺利，最后是一个干净利落的入水。
Diving requires skillful take offs, followed by forward or backward somersaults and twists in straight, pike or tuck psitions and then, if all goes well, a clean entry.
一些伸展动作可以让你的压力得到缓解，比如从耳朵到肩部的伸展，脊椎转体和脚尖碰触。
Certain stretches can provide stress relief, such as ear-to-shoulder stretches, spine rotations and toe touching.
下法就是在一套动作做完后选手脱离器械的方式方法，通常以一个高难度转体或者腾空翻来结束其整套动作。
To dismount means to leave an apparatus at the end of a routine, usually done with a difficult twist or salto.
他准备做他的第七个动作，向前翻腾一周半转体半周。
He's going to go his seventh dive, the forward one and a half somersaults with half twist.
三种技术的挥拍动作均是由转体、拍臂依次加速的鞭打动作。
However all the techniques are whippings which are to speed up from the twist of the body to swing of the arms.
分析讨论了角动量守恒定律在空翻、转体以及旋空翻等竞技动作中的具体应用。
This paper analyzes and discusses specific application of the conservation law of angular momentum in competitive sports, such as aerial tumbling, trunk rotation and somersault.
在练习时，我们先要做的是一个叫“三个数翻身”的动作训练转体。
During practice, we do three-count rolls to work on rotation.
在练习时，我们先要做的是一个叫“三个数翻身”的动作训练转体。
During practice, we do three-count rolls to work on rotation.
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