Sedaei admits that the outflow of information from Iran has subsided, but he does not believe that it has stopped forever.

VOA: standard.2010.06.15

And then he just takes that narrow column of light and he admits it to a prism. And what the prism does is takes a tiny, tiny difference in wavelength and refracts it through a different angle.

他只取了那个窄光柱,然后把它对准一个棱镜，棱镜所做的就是,测量出波长的细微差别,然后从不同的角度测定它的折射度。

麻省理工公开课 - 固态化学导论课程节选

But he admits that he takes it off now and then when it becomes uncomfortable.

VOA: standard.2009.04.30