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。

那个时代，没有任何东西是拆包的，即使是人们脑子里的东西。每样东西不是储存着，就是在运送当中。

For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.

It's all about trying to make something that's as complex and as true to life as possible.

能源的未来在于平衡传统资源和可再生发展。