对于系统，翻版的模拟是在控制图中添加一个创建循环的边，而不仅仅是一个附加节点。

The number one organ of ridicule, nowadays, is the newspaper. If you open the newspaper any day of the week, it's full of people who've messed up their lives. They've slept with the wrong person, taken the wrong substance, passed the wrong piece of legislation -- whatever it is, and then are fit for ridicule. In other words, they have failed. And they are described as "losers." Now, is there any alternative to this? I think the Western tradition shows us one glorious alternative, which is tragedy.

做出伟大工作的唯一途径是热爱你所做的事。

从事物的本质来看，权力必须制约权力。