When we have gravity an object is influenced by the gravitational acceleration and the gravitational acceleration is a constant.
当我们考虑到重力时，物体受重力，加速度影响，重力加速度，是一个常数。
2
The optimum ma-chine index (ration of screen acceleration to acceleration due to gravity) can be adjusted to each particular application by means of the variable out-of-balance force.
对于每一个具体的应用案例。可以通过调节偏心力获得最优的设备运行参数{筛分加速度和重力加速度的比值！
3
This equivalence between acceleration and gravity means that we can investigate the effect of acceleration on time by noting what effect gravity has.