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1·The only condition for this law is no unbalanced force should act upon it.

这条定律的唯一条件是没有不平力的影响。

2·But the shaft by the unbalanced force, serious wear and tear, leak bigger.

但泵轴受不平衡力，磨损严肃，走漏较大。

3·The plastic complementary energy norm is the norm of unbalanced force, whose magnitude indicates the global stability of cavern group.

塑性余能范数是不平衡力的范数，其大小表征库群整体稳定性；

4·An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

静止的物体永远保持静止，运动的物体除非受到不平衡力的作用，会做同一方向的匀速运动。

5·The acceleration produced by an unbalanced force acting on an object (or mass) is directly proportional to the magnitude of the force and in the direction of the force.

译文：加速度是由于受到作用在物体（或质量）上的非平衡的作用（力）而产生的，其与力的大小成正比，方向沿力的方向。

6·Based on analyzing the unbalanced force of crank-connecting rod mechanism, this paper describes the balance of motorcycle single-cylinder engine according to practices home and abroad.

在分析摩托车发动机曲柄连杆机构不平衡力的基础上，结合国内和国外的实践，总结了摩托车单缸发动机的基本平衡方法。

7·The effects of stator and rotor eccentricity on the magnetic field distributions, cogging torque and unbalanced force were calculated in this paper by using finite element method (FEM).

采用有限元法计算分析了定子偏心与转子偏心对无刷直流电动机的气隙磁场、定位力矩及单向磁拉力的影响。

8·This unbalanced centrifugal force on the rotor bearing will cause vibration, noise and accelerate the bearing wear, which seriously affect the performance and life of the product.

这种不平衡离心力作用在转子轴承上会引起振动，产生噪声和加速轴承磨损，以致严重影响产品的性能和寿命。

9·The unbalanced centrifugal force can cause vibration, noise and bearing wear of the rotor bearing, so that it can seriously affect the performance and life of the product.

这种不平衡离心力作用在转子轴承上会引起振动，产生噪声和加速轴承磨损，以致严重影响产品的性能和寿命。

10·The common gear pump has such merits as simple structure, low cost, insensitive oil pollution, etc. but it has such demerits as high flow pulsation, unbalanced radial force, strong noise, etc.

普通齿轮泵具有结构简单、成本低、对油液污染不敏感等特点，但具有流量脉动大、径向力不平衡、噪声高等缺点。