But there was still work to do to complete the transition from mechanical models of the atom to observable quantities measured in the laboratory as the basis for a quantum mechanics.

但仍要做很多工作以完成从原子的力学模型到实验室可测的可观测量的转变，并将其作为量子力学的基础。

youdao

So, what he did was kind of impose a quantum mechanical model, not a full one, just the idea that those energy levels were quantized on to the classical picture of an atom that has a discreet orbit.

还不是完整的，只是这些能级，是量子化的概念，作用到原子有分立轨道的经典原子模型上，当他做了一些计算后，他得到有个半径，他算出来。

youdao