强化是获得新行为模式的核心因素。
Reinforcement is the central factor in the acquisition of new behavior patterns.
唯一真正的错误是我们从中什么也没学到的错误。
The details are not the details. They make the design.
最有效的调试工具仍然是仔细的思考,再加上明智地放置的打印语句。