L'absence est le plus grand des maux.

I’m not perfect, but I’m always me.

The search for understanding the universe is a journey that never ends.

The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

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。