Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in three dimensions.

有些运动主要涉及整体的垂直或水平运动，其中转动可以忽略，可以用三维线性运动的简单方程来研究。

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The invention provides novel mechanisms and methods for effecting rotational and translational motion in three dimensions of objects carried by, or coupled to, actuators that move along a pathway.

本发明提供在由沿着一路径移动的致动器运载或耦合到所述致动器的物体的三维中实现旋转和平移运动的新颖的机构和方法。

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But the unwieldy dimensions of these new buildings will turn their migration into a slow-motion race in which nearly three-dozen units will lumber to the city from a factory in Berwick, Pa.

WSJ: Bathrooms' Long Trek to Replace Sandy-Wrecked Facilities