And,by filling in the blanks, they see the real material that been used in the reconstruction, but they also see what the animal looks like in its entirety."

VOA: standard.2009.12.08

I want to look at the energy starting from real material.

我们从身边真实的材料说起这些能量。

麻省理工公开课 - 固态化学导论课程节选

They're actively engaged in the material, actually seeing the phenomena, by making measurements of real world experiments.

学生们能自主地参与到物质中，看见真切的现象，通过对真实世界实验,做出测量。

麻省理工公开课 - 媒体、教育、市场课程节选