And even if they used gliding flight, they would need to be exposed to very high wind velocities at take off - such high winds that they would be blown away and have no need for wings.
即便用滑翔，他们也需要利用相当大的风速帮助起飞，而在这样的狂风中他们完全不需要翅膀，直接就被吹走。
2
If you are looking at actual wind velocities in weather prediction then the regions with high curl tend to be hurricanes or tornadoes or things like that. They are not very pleasant things.
你看天气预报中实际风速图中，高旋度的地方可能是飓风，或龙卷风，或那样的东西，让人很讨厌的东西。
3
The longitudinal grooves seen in the foreground are thought to be due to differential shear and lateral spreading at highvelocities.