Of course there is a strong counterforce to keep the environment uniform.当然，有一股强大的反作用力在保持环境的统一。
However, in the actual training there is an obvious counterforce which is often neglected, but should be carefully considered in the same time.但实际训练中明显存在的反作用力，常常被人们忽视，我们必须加以认真研究。
