rotation

• Locations on the earth's surface are specified in terms of the earth's axis of rotation .
  地面的定位是沿着地球的自转轴而定的。
• This increases both the rigid body rotation of the vehicle and the bending moment .
  这既增加了飞行器的刚体转动，也增加了弯矩。
• The above argument is strongly reinforced by the observed rotation rate of stars .
  上述观点已为观测到的恒星自转速率有力地证实。
• The e-vector makes one complete rotation as the wave advances through one wavelength .
  当波前进了一个波长之后，E矢量转了一整周。
• Often translation and rotation occur simultaneously, as in the case of a rolling drum .
  通常平动和转动同时发生，例如，圆筒的滚动。
• The blades at its periphery throw off air centrifugally in a direction following the rotation .
  轮周叶片将空气沿着转动方向抛离轴心。
• Clearly the virtual rotation about a is the geometric equivalent of taking moments about a .
  显然绕A的虚转动在几何上等价于对A点取矩。
• For geophysical purposes it is customary to use solar rotations of 27. 0 day .
  为适应地球物理学的需要，习惯上以270日为太阳自转周期。
• The first boundary error has to be weighted by rotations and second by displacements .
  第一个边界误差要用转角来加权，而第二个则用位移来加权。
• Also important are the rotation of the slipstream and the change of downwash at the tail .
  此外，滑流的旋转和尾翼处下洗的变化也是重要的因素。