SketchUp provides a number of existing materials.

SketchUp提供了很多现成的材质。

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Course management systems allow instructors to create and arrange existing materials for easy consumption.

课程管理系统能让指导者创建并安排现有材料，便于使用。

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The finding is good news for all commercial applications of carbon nanotubes, which are currently held back by substantially higher costs relative to existing materials.

这些研究成果对于碳纳米管的商业应用来说是个很好的消息——目前主要受制于相对现有材料来说高很多的成本。

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It's instead a process of organizing pre-existing materials And imposing order on those chaotic materials.

相反，它是一个组织原来存在物质的过程,并且给这些混乱的物质赋予秩序。

耶鲁公开课 - 旧约导论课程节选

As this survey will show, nanotechnology will indeed affect every industry through improvements to existing materials and products, as well as allowing the creation of entirely new materials.

ECONOMIST: Small wonders

Games and hands-on exercises were designed to show what is available on the internet (reading materials, existing guidelines and discussion groups) so they may continue to increase their knowledge and understanding on archiving.

UNESCO: Education

By embedding energy-storage materials into existing structures, this sheet technology would allow for ubiquitous storage and delivery of electric power and potential integration of clean energy into nearly every corner of our daily lives.

FORBES: Are Paper Batteries A Pipe Dream?