Ring cross-sustaining stance is a kind of necessary static-force motion for well-trained gymnasts in competition.

吊环十字支撑是高级体操运动员在比赛中不可缺少的静止用力动作。

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The force is always perpendicular to the direction of motion.

因为这个力总是垂直,于运动的方向。

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In particular, a force field with no curl is a force field that does not generate any rotation motion.

特别地，一个没有旋度的力场，就是一个不产生任何旋转运动的力场。

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The feedback Chenoweth has received steels her belief that this exposure, however uncomfortable it might be for both participants and onlookers, is a force for forward motion.

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