"What's very interesting about vitamin D is that it's involved all throughout the body, and it's involved on a local level, so you can have vitamin D active in the breasts, in the prostate,in the colon, and it's thought that the locally-acting vitamin D is helping to protect the body against these cancers, regulating how cells grow and how cells die."

VOA: standard.2010.05.28

Let's think about it in terms of the local level and then perhaps the national and international level.

让我们来基于本地,全国，全球来想一想。

麻省理工公开课 - 媒体、教育、市场课程节选

Let's think about it in terms of the local level and then perhaps the national and international level.

让我们来基于本地,全国，全球来想一想。

麻省理工公开课 - 媒体、教育、市场课程节选