With high-speed wind tests of scale models under way, the blended wing could take flight before 2020.

目前，等比例模型的高速风洞测试正在进行中，预计混合机翼能在2020年前起飞。

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The two different categories are multi-blade wind wheel and high speed wind wheel.

两种不同类别是指多翼风轮和高速风轮。

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Variable speed wind turbine is one of hot research fields in large wind turbines these days.

变转速风力机是当前大型风力机研究领域的研究热点之一。

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They said the overall strength of storms measured by wind speed might increase two to eleven percent by the year twenty-one hundred.

VOA: special.2010.08.24

Scientists use the Saffir-Simpson Hurricane Scale to measure the intensity of storms based on wind speed.

VOA: special.2010.08.24

This time,scientists hope to learn more about the formation, wind speed and shape of tornadoes.

VOA: special.2009.06.09

The wind gains strength from the thermal energy of the ocean, eventually condensing vapors and circulating air fast enough to form high-speed wind and heavy rain.

CNN: graphic

Sudden changes in wind speed or direction, known as wind shear, can lift or smash aircraft into the ground during landing.

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Those teams will also be allowed unlimited out-of-season track testing, with no restrictions on the scale and speed of wind-tunnel testing.

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