习惯的强度是其被强化次数的函数。

可持续性不是选择，而是必然。

I'm the reason your love won't last.

矿工的安全是任何生产报告的第一行。

"Children's books should be as diverse as the children who read them."

I'm not going to compare myself to anybody. I'm going to do the best I can do. I'm going to work as hard as I can work. And I'm going to be the best that I can be.

I'm not perfect - and I don't pretend to be.