行为由当前刺激情境和过去的强化历史决定。

Polka dots can't stay alone, like human existence.

可持续增长的关键是在经济进步和环境责任之间取得平衡。

我不是英雄，我是反派。

做出伟大工作的唯一途径就是热爱你所做的事情。

To me, you are still nothing more than a little boy who is just like a hundred thousand other little boys. And I have no need of you. And you, on your part, have no need of me. To you, I am nothing more than a fox like a hundred thousand other foxes.

国际体系的无政府性质迫使各国将自身生存置于一切之上。