It is caused because of the main motion and overlaps on top of the main motion.

它的产生是由于主体的运动和在主体上的交迭运动。

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This paper analyzes hydrostatic servo actuator in motion system for flight simulator, and introduces structural principle of main component of the system.

本文对飞行模拟器运动系统的静压伺服作动器进行了分析，介绍了系统主要元件的结构原理。

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Another example, if an alien is walking and it has an antenna on it, the antenna will probably sway as a result of the main body motion.

另一个例子，如果一个外星人走路，并且它头上长有一个天线，这个天线随着身体运动而摇摆。

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The SDLP amendment was defeated by 78 votes to 13 and the main motion was passed by cross-community consent.

BBC: Continuation of the Department of Justice

The main motion was then approved without a vote.

BBC: House of Commons administration debate

The American film industry is extremely reluctant to discuss the China concessions Hollywood is making, and the industry's main lobbying group, the Motion Picture Association of America, tries to portray the practice in the best possible light.

NPR: Hollywood Yielding To China's Growing Film Clout