"We are not backing away. We are going full steam ahead with our programs in Iran and across the region,again in order to create that space for civil societies to actually play the proper role that we would all understand in building more accountable democratic governing institutions,".

VOA: standard.2009.10.28

Finding an electron in a region of space.

在一个空间的范围找到一个电子。

麻省理工公开课 - 固态化学导论课程节选

Finding an electron in a region of space.

在一个空间的范围找到一个电子。

麻省理工公开课 - 固态化学导论课程节选