So all that Bohr, for example, had to go on at this point was a more classical picture of the atom, as you can see on the left side of the screen there, which is the idea that the electrons orbiting the nucleus.

原子的经典图像，你们可以,看到屏幕左边，这是电子，绕着核子旋转，的概念,他已经知道。

麻省理工公开课 - 化学原理课程节选

You see these images on computer screens all the time; it's an example of an EKG or ECG, an electrocardiograph.

你会一直在电脑屏幕上看到这样的图像,这就是EKG或者ECG,即心电图

耶鲁公开课 - 生物医学工程探索课程节选