You can also perform a test. Take some of the material and add enough water to it to make it seem like you are making bread.

VOA: special.2009.09.14

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

It is not about making the material relevant and easy to apply in given opportunities to do that. It is not about creating interaction in community.

不是整理相关材料,以便于时机适宜时容易,利用，不是,在社群内进行互动。

麻省理工公开课 - 媒体、教育、市场课程节选

Then,she started making statues out of cement material and glass.

VOA: special.2010.04.14

In the northern part of Kunduz province, the U.S.military says, an overnight raid by Afghan and coalition forces killed 11 militants who were in possession of bomb-making material and rocket-propelled grenades.

VOA: standard.2009.09.12