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汉语拼音：lì ǒu

作用在物体上的大小相等，方向相反，但不在同一条直线上的两个力。能使物体改变其转动状态。如汽车驾驶员用双手转动方向盘时所施加的就是一个力偶。

• A pair of forces of equal magnitude acting in parallel but opposite directions, capable of causing rotation but not translation.

  力偶具有相等磁性的两个力，平衡作用但反向，能导致旋转但不能造成平移

• In this section, we shall consider the conditions that the forces and couples acting upon a body must satisfy in order to be in equilibrium.

  在这一部分，我们将研究为了使一个物体保持平衡，作用在其上的力和力偶所必须满足的条件。

• A couple consisting of only two vectors is called a simple couple.

  仅由两个矢量组成的力偶叫作简单力偶。

• By using inverse method, the analytical solutions of couple stress fluids were obtained for steady and unsteady cases.

  本文采用逆方法研究并获得了应力偶流体的定常和非定常精确解。

• The excitation comes from the friction couple.

  受摩擦力偶激发。

• When the thickness and diameter is small, the eccentricity force is small, so we can use the wheel without adjustment.

  通常我们使用的砂轮在厚度和直径都不大的情况下，其所引起的不平衡离心力或力偶较小，所以不经平衡就使用了。

• as can be seen by reference to eq . ( 4 . 1 . 3 ) , a couple has the same moment about all points.

  正如依据式（413）可看到的那样，力偶对所有点之矩都是相等的。

• the couple is the mechanics foundation in "the round wheel" phenomenon, where the effect is decided by the moment of couple ;

  力偶是“圆轮”现象的力学基础，跤术中的“圆轮”现象取决于力偶矩；

• plane balanced system of forces, the concept of couple, couple, Department of balance;

  平面汇交力系地均衡、力偶地概念、力偶系地均衡；