毛笔的主要制作材料是什么？

What are the writing brushes mainly made of?

youdao

项目中使用的主要材料是什么？

What were the principal materials used in the project?

youdao

古代造纸所需要的材料是什么？

What did the people need to make paper in ancient time?

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What gives it those properties?

是什么赋予了材料这样的属性

耶鲁公开课 - 生物医学工程探索课程节选

Because you trust biomedical engineers to have done a good job in designing these things and we'll talk about how biomaterials are designed and tested, and what makes a material, the properties of a material that you could use as a contact lens, what are the properties that it needs to have.

因为你深信生物医学工程师们,在设计这些材料时,已经做了充分的工作,我们会讨论如何设计和测试这些生物材料,什么材质具有,能够用来,做成隐形眼镜的材料的属性,它们需要具备的特性究竟是什么

耶鲁公开课 - 生物医学工程探索课程节选