学习是系统中产生的任何变化,这些变化或多或少会永久性地改变其适应环境的能力。
The secret of being miserable is to have leisure to bother about whether you are happy or not.
A writer is a person who is not satisfied with the world as it is, who wants to change it, to improve it, to make it more beautiful, more just, more livable.