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。
In addition, the plane of the blades is parallel to the pole, so that a ground-hugging wind hits the blades face on.
叶片病斑初为暗褐色小点，后扩大成黑褐色圆斑，潮湿时在叶片正面产生橘红色粘质小点，干燥时转变为黑色；
The viscid dot appears on the front of blade, when it is moist, and change into black at the time of the dryness;
但是，如果此处地面确实是倾斜的，这则意味着风(贴近地面吹向叶面)从一种角度吹向发电机叶片，而非正面对吹。
But if that ground is, indeed, sloping, it means that the wind (which tends to follow the ground when it is close to the surface) hits the blades of the turbines at an Angle instead of face on.
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