If anyone tries to tell you we're using fewer materials, send him this book.

如果有人试图告诉你，我们现在用的材料减少了，就给他看这本书。

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He decided better designs could also help humans do more, using fewer materials.

VOA: special.2010.05.30

In turn, the process has a positive impact on the environment by using fewer materials.

FORBES: Hybrid UAV Wing Created with 3D Printing and Printed Electronics

The Solaria panels thus produce similar power at comparable efficiencies as standard panels while using fewer materials.

FORBES: U.S. Army Dedicates World's Largest Low-Concentration PV Facility

Smaller crews of more highly trained workers who can switch jobs with ease, as the research engineers upstream of them dream up new ways to manufacture products using fewer raw materials and less labor.

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