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.

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巷道围岩压力与支护能力是一个相互作用与反作用的关系，两者之间必须协调才能取得较好支护效果。

The relationship of roadway surrounding rock pressure and supporting performance is interacting and counteracting. Only coordination between them can make possible a better support.

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