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。
"Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."
"In the world of investing, the ability to adapt is more important than the ability to predict."
The most basic human desire is to be recognized as a human being, and the most basic human fear is to be treated as less than human.
