The picture is taken from close up with severe lighting effects.

VOA: special.2009.08.09

I wonder if there's some UV light out of this new lighting set up in our classroom here.

好的，我想知道这里,我们教室里的这套新的照明装置,是否有一些紫外光出来。

麻省理工公开课 - 化学原理课程节选

I wonder if there's some UV light out of this new lighting set up in our classroom here.

好的，我想知道这里,我们教室里的这套新的照明装置,是否有一些紫外光出来。

麻省理工公开课 - 化学原理课程节选