While many developing-world communities might not be ready for Hunt's runoff management model, Urbonas believes it is important for them to be aware of the pollutants present in stormwater even as they learn to manage their community's waste water.

VOA: standard.2010.08.04

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