但是他们也跟空气阻力作斗争。
减少空气阻力，从而降低燃料消耗。
大气速度提供举升力和空气阻力。
如果没有空气阻力，可以达到每小时225英里。
Without the air drag, we would have reached 225 miles per hour.
对密度大的货物空气阻力可忽略不计。
The air resistance may be overlooked if the load density is large.
现在是最后一部分，就是，空气阻力如何影响轨道？
Now comes my last part, and that is, how does air drag influence trajectories?
要制造飞机，就必须考虑空气阻力的问题。
Air resistance must be given carefully consideration when the aircraft is to be manufactured.
我无法消除空气阻力。
要制造飞机，就必须仔细考虑空气阻力问题。
Air resistance must be given careful consideration when the aircraft is to be manufactured.
网球受到空气阻力。
减少空气阻力最低。
它未曾变过,如果没有空气阻力,或任何摩擦力。
That never changes if there is no air drag or air friction of any kind.
加大空气阻力。
由于类似空气阻力的牵引作用，这些气体的（运行）速度减缓。
The gas was slowed by a drag force similar to air resistance.
稀薄的空气阻力很小，对于运动员来说可以轻松穿破。
其中影响系数最大的为空气阻力和密封胶条作用力的影响。
And the biggest influence coefficient is the air resistance and the force generated from sealing.
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).
这样就加大了空气阻力，并减少了它们着地时冲击力带来的震动。
This increases their air-resistance and reduces the shock of impact when they hit the ground.
这样就加大了空气阻力，并减少了它们着地时冲击力带来的震动。
This increases their air-resistance and reduces the shock of impact when they hit the ground.
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