The goal of this tutorial is to create a simple yet elegant Chess set in a clean and efficient way.

本教程的目标是创建一个简单而优雅的在清洁和高效的方式设置国际象棋。

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Natural gas has been used widely in most developed countries as a clean and efficient energy sources.

作为一种清洁、高效的优质能源，天然气在大多数发达国家得到了普遍应用。

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Then we will shape the geometry to create a clean and efficient model that will be about 2500 polygons.

然后我们将塑造大约2500个多角形的一个干净和高效率的几何模型。

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Lets say a person chooses one of the NeoLink servers on the network from the home screen, they will be taken to those servers files via a clean and efficient UI.

ENGADGET: HD Review: NeoDigits X5000 Networkable DVD player

We found some incredible student innovators including our 2008 winner, Husk Power Systems a social enterprise that has already provided clean, safe and efficient electricity to more than 150, 000 low-income people in rural India.

FORBES: Student Innovators Save the World: Part 1

Since gas-fired generation is about the most scalable, efficient, flexible, clean and (on a large scale) lowish-carbon form of electricity available, it is going to prove economically and politically attractive.

WSJ: After Japan's Earthquake and Fukushima Disaster, Matt Ridley on Gas-Fired Generation and Thorium | Mind & Matter