In addition, the plane of the blades is parallel to the pole, so that a ground-hugging wind hits the blades face on.
此外，叶片平面同塔杆平行，从而使一股贴在地面的风吹打在叶片正面。
Some of these techniques are being used on board a plane that is zigzagging from pole to pole.
有些技术手段还被用于在两极之间迂回地飞行的飞机上来测量大气中的含氧量。
The effect is that of a force, perpendicular to the plane, acting on the magnetic pole .
这个效应表明，有一种垂直于圈平面的力作用在磁极上。
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