Gliding distance is an imperfect measure of an airliner's aerodynamic efficiency, since it is not designed for gliding.

其实滑翔距离并不能作为客机气动效率的评价手段，因为这不是它的设计初衷。

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Wing outfit flight is also called short distance sky gliding sport, which was born less than 20 years.

翼装飞行也叫近距离天际滑翔运动，诞生不到20年的历史。

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