In this paper, we attempt to discuss the conditions of closed orbit in more general -cases on the basis of the method of action-angle variables in analytical mechanics.

本文试图采用分析力学中作用角变量的方法，对一般情形下的轨道闭合条件进行讨论。

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On the basis of the method of action-angle variables the conditions of closed orbits under the action of general power-type gravitation potential are discussed on this paper.

本文采用作用角变量的方法，讨论了闭合轨道在一般幂次型引力势作用下的情况。

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From the Angle of Biomechanics, this paper makes analysis on action effect of forehand shot in tennis.

从生物力学的角度，对网球正手击球的动作效果进行分析与评价。

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The positioning moves with the plays to focus on the offensive action, making this angle especially useful for goal-line situations.

ENGADGET: CBS Super Bowl 'second screen' stream to include alternate cameras, DVR functionality

The Sideline camera angle provides field-level views of the action from a camera mounted on a cart.

ENGADGET: CBS Super Bowl 'second screen' stream to include alternate cameras, DVR functionality

There are some annoying camera angle issues, but by and large these are no worse than many other third-person action games, and you get used to the camera controls as you progress.

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