作用和反作用的定律是通用的。
可见作用和反作用涉及两个物体。
因此这种作用和反作用是共存的。 那么它将直接导致这样的观点，那就是弯曲的空间是不可能存在的。
Only the existence of a field of force can account for the motions of the bodies as observed, and its assumption dispenses with space curvature.
他描绘了不肯的原谅的成瘾，以及大脑在这个过程所从事的工作，还有就是最终的反作用一般都会在某个人的身体和生活中发挥一定的作用。
He describes the causes of being unforgiving, how the mind works in this process, and the ultimate negative effects this attitude can exert on one's body and life in general.
第三运动定律是：作用引起反作用，这些作用大小相等和方向相反。
The third law of motion is that action causes a reaction and that these are equal and opposite.
每一个作用力都会引起相等的和相反的反作用力。
反作用（二级）力：当物体反抗原始力的影响时，惯性和动力的效果便是反作用力。
Reacting ( Secondary ) Forces: the evidence of the effects of inertia or momentum in the body as it reacts to the influence of the Initiating Force.
按阀瓣的位置不同可分为正作用式和反作用式。
Different may divide into the positive effects type and the reaction type according to the valve petal's position.
根据牛顿运动第三定律，作用力和反作用力是大小相等方向相反的。
According to Newton's Third Law of Motion action and reaction are equal and opposite.
利用作用力做功和反作用力做功的代数和与参照系的选择无关这样的结论，计算质点组的内力作功之和将非常简捷方便。
The sum of work of effect and reaction has nothing to do with the choice of criterion. With this conclusion, it is very easy to work out the sum of particle and work of internal force.
人机工程学的研究对象是以人为核心 ，研究人在设计、制造和使用人造物过程中所发生的全部人机关系 ，而且必须充分关注这一过程中环境因素的作用、限制和反作用。
The study object of human-machine engineering is the whole relation between people and machine in the process of involving, manufacturing, and using man-made things, which is based on people.
人机工程学的研究对象是以人为核心 ，研究人在设计、制造和使用人造物过程中所发生的全部人机关系 ，而且必须充分关注这一过程中环境因素的作用、限制和反作用。
The study object of human-machine engineering is the whole relation between people and machine in the process of involving, manufacturing, and using man-made things, which is based on people.
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