Astronauts added a new wide field camera and a new spectrograph.

VOA: special.2009.09.30

There it is. He used the prism spectrograph to analyze his results. So what do we have here?

在这里，他用了棱镜分光图来分析他的结果,得到些什么呢？

麻省理工公开课 - 固态化学导论课程节选