在计算中，不变量是短暂的。
The difference between the impossible and the possible lies in a person’s determination.
简单化的艺术是复杂性的谜题。
诗歌不是一种奢侈品，而是一种必需品。
The rule, or measuring rod, which the behaviorist puts in front of him always is: Can I describe this bit of behavior I see in terms of "stimulus and response"?
