Dr.Huerta says many Latin and South American communities do not have mammography machines, and there is a general lack of knowledge about the disease.

VOA: standard.2010.02.02

I am talking at the level of this is Dalton's model, but then there is a meta knowledge here of how you develop models in general.

我一是在谈论道尔顿的模型，但是，还有些知识,关于你如何建立大概的模型。

麻省理工公开课 - 固态化学导论课程节选