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。
For every expert there is an equal and opposite expert, but for every fact there is not necessarily an equal and opposite fact.
The bond market is the smartest market in the world.
The laser is to attosecond physics what the telescope was to astronomy.