抽象是管理大型软件系统复杂性的关键。
Abstraction is the key to managing complexity in large software systems.
It's not supposed to be easy.Anyone who finds it easy is stupid.
Sustainability isn't an option; it's a necessity for the future of energy.
Mental phenomena are best understood as bridges between environmental demands and organismic responses.
"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors."