Responding to the need for safe, clean and affordable lighting, Irvine-Halliday set to work on a solution.

VOA: standard.2009.12.13

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