但是当向前飞行时，它的旋翼将转向直升飞机的前方(如此一来，就变成朝向迎面而来的空气)，经过叶片上方的气流将比经过叶片背面的气流产生更大的升力。
But when flying forward the air passing over the blade that is advancing to the front of the helicopter (and so into oncoming air) provides more lift than the one that is retreating to the back.
这些叶片拥有机翼的剖面形状，它们就像普通飞机的机翼那样，通过划过空气来产生升力。
The blades have an aerofoil shape and provide lift when passing through air, like the wings of an aeroplane.
飞机上的机翼制造升力超过阻力，但具体取决于机翼的设计和当时经过的空气流动速率。
The aerofoil of a wing creates more lift than drag, but exactly how much depends on its design and the speed of the air passing over it.
但这项新的研究表明，有点向下弯曲的翅膀确实能从每次拍打中获得更多的空气挤压升力。
But this new study shows that wings with a little flop can actually get more air-pushing lift from each flap.
当鱼鳍的形状通过流动的空气产生比其(空气)阻力更多的升力时，飞行物便能飞翔。
When the shape of a wing creates more lift from the air passing around it than it does drag (air resistance), an aircraft will fly.
在空气动力学上，升力是重量，推力和阻力(空气阻力)的相关的函数。
In aerodynamic terms, lift is a function of weight, thrust and drag (air resistance).
空气中运行的旋转球的受力通常分为两种：升力和阻力。
The forces on a spinning ball that is flying through the air are generally divided into two types: a lift force and a drag force.
较大的重型飞机比较小的轻型飞机要移动更多的空气、制造更大的提升力以支持飞行。
A larger and heavier aircraft must displace more air and create more lift to sustain flight, compared with small, light aircraft.
拉力是一种物体在空气中所受到的阻力，它能产生与球运行方向相反的作用力，减缓球的运行速度，而升力则是一种能使物体偏离直线运行轨迹的力。
Drag is the force of air resistance pushing against a ball's motion and slowing it down, while lift is a force causing a ball to swerve off a straight path.
由于地处高海拔地区，气压较低，因而作用在球上的阻力及升力所产生的空气动力效应也会发生相应反应，最终导致球在空中飞行速度比在低海拔地区快，飞行的路线也更直。
At altitude, the air pressure is lower, and so are aerodynamic effects such as drag and lift, ultimately causing balls to travel faster and straighter than they would at lower altitude.
在空气稀薄的平流层中，如何产生升力是一个问题。这种飞艇通过氢气浮力和空气动力制造升力的设计看上去能够解决这个难题。
Lift is a problem in the rarefied air of the stratosphere, and it seems such a design can help.
这将有效地“拉”前沿周围的空气，从而防止失速到一个更高的入射角和升力系数。
This effectively "pulls" the air around the leading edge, thus preventing the stall up to a much higher Angle of incidence and lift coefficient.
浮空器从周围空气的浮力而不是从空气动力获得提升力的航空器，特指气球或飞船。
An aircraft, especially a balloon or dirigible, deriving its lift from the buoyancy of surrounding air rather than from aerodynamic motion.
对新款车的前后区域均进行了空气动力学微调，这样做旨在确保最大限度地平衡前后轴的升力系数。
The aerodynamic fine tuning in the front and rear areas is designed to guarantee an optimum balance in the lift coefficients at the front and rear axles.
为了保持飞行速度，产生一定的气动升力，鸟类用三种办法来克服空气阻力。
In order to keep the flying speed, produce certain aerodynamic lift, the birds overcome the air resistance with three kinds of methods.
运用空气动力学原理，对标枪的纵轴旋转与压强阻力、偏向力、上升力及稳定性的关系进行分析研究，以更好地指导运动训练的实践。
The paper elaborates on the relations between the revolve of Javelin and pressure resistance, deflection force, ascensus force as well as stability.
为了优化无人驾驶航空飞行器在整个飞行过程中的空气动力特性而使机身、推进系统和升力控制面一体化的设计技术。
Design technology for integration of air vehicle fuselage, propulsion system and lifting control surfaces to optimize aerodynamic performance throughout the flight regime of an unmanned air vehicle.
大气速度提供举升力和空气阻力。
将高速滑体制成相似的机翼模型，进行风洞试验，即可测定滑坡凌空飞行的空气动力学参数，从而计算大型高速滑坡凌空飞行的空气动力升力、飞行速度和飞行距离等。
If we make a wing model which is similar to sliding mass, we can determine aerodynamic parameters by the wind tunnel testing and thus calculate the lift.
能估算可压缩无粘流中，基本空气动力外形的升力和阻力。
Calculate the lift and drag over simple aerodynamic shapes in compressible, inviscid flows.
昆虫通过高频扇翅可以产生很大的升力，相关的非定常空气动力学机理及理论逐渐被人们所认识。
Until recently, it has become clear that unsteady mechanism, including high frequency flapping, is necessary for insects to produce enough lift and to keep themselves aloft.
介绍了用于拍动翼的非定常空气动力特性和高升力机理。
The unsteady aerodynamics and the unsteady high-lift mechanisms applied in flapping wings are introduced.
启合式扑翼发明属航空飞行器空气动力学领域。可解决旋转翼和固定翼航空飞行器的正交方向阻力超升力增加的问题。
The present invention relates to flyer and aerodynamics and can solve the problem that the resistance in orthogonal direction increases faster than lift in rotary wing and fixed wing flyer.
启合式扑翼发明属航空飞行器空气动力学领域。可解决旋转翼和固定翼航空飞行器的正交方向阻力超升力增加的问题。
The present invention relates to flyer and aerodynamics and can solve the problem that the resistance in orthogonal direction increases faster than lift in rotary wing and fixed wing flyer.
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