So, this is exactly how Rutherford did discover that these particles were present and made this new model for the atom that we now know has both a nucleus, and we know the size, and also has electrons.

他提出了一个,新的原子模型,这里面有一个原子核,和一个电子，原子核的尺寸是知道的。

麻省理工公开课 - 化学原理课程节选

And finally, there's a new situation and no model of how to behave.

最后，如果这个实验没做过,我们就没有行为模式可以借鉴。

耶鲁公开课 - 心理学导论课程节选

Now, Bohr comes with a new improved model.

现在，波尔想到一个改进的模型。

麻省理工公开课 - 固态化学导论课程节选