Statistical principle of the proportional frequency between random drawings of an event and all the occurrences of the event.

平均权定律(一种统计的法则，用来观察一事件的抽样，与此事件所有可能发生的情况之间的比例)。

Idea that in the long run things will break even and, therefore, a hoped-for outcome will emerge.

认为事情是盈亏各半，但前途仍大有希望的观念。