很多人认为地球绕太阳的轨道是完美的圆形，就像手在一块制作精良的手表上移动那样平滑、有规则，但事实并非如此。
A lot of people think of earth's orbit around the sun as being perfectly circular, as smooth and as regular as, say, the way that hands move on a well-made watch, but it just doesn't work that way.
促使电子绕电路移动的力被叫做电动势。
The force that causes electrons to move around a circuit is called electromotive force.
该轴构造成在偏心凸轮内选择性地移动，并且显示面板单元构造成当轴 在偏心凸轮内移动时绕旋转轴线旋转。
The shaft is structured to optionally move in the offset cam, and the display panel unit is structured to rotating around a spin axis when the shaft moves in the offset cam.
本文的关键是通过求解二阶绕射速度势获得三维移动物体的二阶倍频波浪力。
The key of this paper is the solution of the second-order double-frequency wave exciting force for a floating body sailing in waves by solving second-order diffraction potential.
设P和Q为平面内两个互不相交的简单多边形 ，若 P在平面内绕某点旋转 ，文中讨论了其旋转可移动性问题 。
Let P and Q be two nonintersecting simple polygons in the plane, this paper discusses the rotational movability of them if P rotates around a point and collides with Q .
设P和Q为平面内两个互不相交的简单多边形 ，若 P在平面内绕某点旋转 ，文中讨论了其旋转可移动性问题 。
Let P and Q be two nonintersecting simple polygons in the plane, this paper discusses the rotational movability of them if P rotates around a point and collides with Q .
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