光波，无论是以太波还是其他波，在所有情况下都是时间上的周期性过程。

"The world is full of stories, but it is the ones we choose to tell that define us."

Psychology is the science of mental life in its adaptive relations.

The power elite is composed of men whose positions enable them to transcend the ordinary environments of ordinary men and women; they are in positions to make decisions having major consequences.