It is underpopulated right now, so if you are still shopping for a humanities subject, this one bears the precious CI-H designation.

现在它们的选课人数比较少，如果你们还需要一门人文学科，这些都是很可贵的沟通密集型课程。

麻省理工公开课 - 固态化学导论课程节选

So, these three are underpopulated.

这三个的人数比较少。

麻省理工公开课 - 固态化学导论课程节选