In audiovisual AIDS, a device that allows a student to respond to the teaching material, e. g. answer a multiple choice question.

在视听辅助教学中使用的一种允许学生答复教材问题(如回答几种选择性问题)的设备。

youdao

For metal material, give the form of the material, e. g. steel coil, rod.

对于金属材料，请给出材料形态，比如金属板材，金属线材。

youdao

Feedstock: Substance (e. g. gas) used as raw material for its chemical properties in creating an end product.

原料、给料：作为原料，利用其化学成分，以生产终端产品的物质(如煤气)。

youdao

G We can take the derivative of G with respect to how much material there is.

我们可以取,对物质总量的偏导数。

麻省理工公开课 - 热力学与动力学课程节选

Recycling hazardous electronic equipment for material recovery (e.g. rare earth, and precious and other metals) in a manner which can substantially mitigate the hazards, entails significant costs.

FORBES: It's Easy Enough To Solve The Problem Of E-Waste