Out, out, brief candle! Life's but a walking shadow, a poor player That struts and frets his hour upon the stage And then is heard no more. It is a tale Told by an idiot, full of sound and fury, Signifying nothing, 

All behavior is motivated by some form of drive reduction.

我们能种植的最宝贵作物是农民与消费者之间的信任。

在儿童时期没有养成思想的习惯。将使他从此以后一生都没有思想的能力。

测量越精确，结果就越依赖于理论。

波点是通往无限的方式。