学习是系统中产生的任何变化,这种变化或多或少会永久性地改变其适应环境的能力。
不要弄乱我的圆!(据传是罗马士兵入侵时,阿基米德临终前的话)
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.