自然界里的万物每时每刻都在运动,绝对静止的物体是没有的。在物理学中,把物体位置的变化叫机械运动,简称运动。描述物体运动要以事先假定不动的物体作为参照物,若被研究的物体相对参照物的位置发生改变,则被研究的物体是运动的;否则,被研究的物体是静止的。如何理解运动和静止 Everything in nature moves all the time, and absolutely stationary objects are not. In physics, the change in the position of an object is called a mechanical movement, referred to as movement. Describe the motion of an object to be presumed immutable as a reference object, if the object under study relative to the reference position changes, the object under study is the movement; otherwise, the object under study is stationary. How to understand exercise and rest