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This paper develops the mathematical models of the wind-sand interaction, taking the saltating cloud as fluidized flow. The force exerting on the airflow by saltating particles is expressed in terms of the drag coefficient of the fluidized particle flow.

本文将跃移风沙流视为一种颗粒拟流体，将跃移颗粒对气流产生的阻力用颗粒流的阻力系数来表达，建立了描写两场相互作用的数学模型。

These results have very important referenced values to simulative calculations and experimental researches on drag and noise reduction with riblets under water.

本文的研究内容对随行波表面水下减阻降噪的仿真模拟计算和实验研究具有重要的参考价值。

In order to reduce the skin friction efficiently,more research works should be done on the characteristics of turbulent boundary layer,turbulent coherent structures and the mechanism of turbulent drag reduction for flow over riblets surfaces.

为更有效地减少表面摩阻，必须深入开展对沟槽面湍流边界层特性、湍流拟序结构及湍流减阻机理等方面的研究。

Hennessey claims that the HPE550 Camaro is capable of a 4.1-second run to 60 mph and a quarter-mile pass of 12.1 seconds at 119 mph on street tires (drag radials are said drop those times to 3.6 seconds and 11.7 seconds at 121 mph, respectively).

亨尼西称， HPE550卡玛洛能够4.1第二次运行到时速60英里和25英里的传递12.1秒一百十九英里每小时街头轮胎（拖动子午胎据说这些倍下降到3.6秒和11.7秒121英里，分别）。

In order to reveal the effects of the longitudinal spacing between the vehicles and vehicle number in platoon on the aerodynamic drag coefficient of vehicle platoon,the numerical simulation method was used to study the aerodynamic characteristics of 11 cases of a serial vehicle platoon in the intelligent transport system.

为了研究队列行驶时，车辆前后间距对队列行驶车辆气动特性的影响以及队列中车辆数目对气动阻力系数的影响，采用数值模拟方法分别对智能交通系统中队列行驶车辆11种不同情况下车辆的气动特性分别进行了研究。

Goddess in the moon-- Qiu Peining is acted the role of by appearance, chen Gong of be not a patch on of nature of this goddess in the moon and model essay of fragrant edition gorgeous, but she removes titles lightly dance and by 8 give up drag sleeve anger and the camera lens of face about still lets a person remember profundity.

嫦娥--邱佩宁饰论相貌，这个嫦娥自然比不上陈红以及范文芳版的艳丽，但片头她翩翩起舞以及被八戒拽住衣袖愤而转身的镜头还是让人记忆深刻。

This SmartPad multimedia remote controller has two touch pads on the back. It can be used as one wireless touchpad or the two touch pands can be combined for multi-touch applications, including the all familiar feature like photo zoom-in and out with simple drag-and-drop action

这款名为 SmartPad 的多媒体遥控器，神奇的地方在於后面是两块触控萤幕，你可以把它当作无线触控版使用，然后也可以把两块触控版作合体技执行多重触控功能，像我们熟悉图片拖拉放大缩小的功能全都有。

The correction of the zero-lift drag is carried on by taking into accunt jet together with the sti...

在零升阻力修正中，本文把喷流效应与尾支架干扰结合起来考虑。

Acceleration will cease eventually because lift and drag build back up since they depend on the speed of the airflow over the wing.

因此，在一个较低的攻角下，会比高攻角下更容易取得恒定的速度。

Because on chain link''s roller and the track are by the rolling contact, the friction drag is small, the power loses lowly, and may the load bearing heavy load capacity.

由于链条上的滚子与轨道是以滚动接触，摩擦阻力小，动力损耗低且可承载较重的荷重。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。