Actually, contrails, short for condensation trails, are essentially clouds. They are no different from the cirrus clouds that naturally form in that region of the atmosphere.
事实上,轨迹,简称为压缩痕迹,其本质上是云。他们跟大气层上自然形式的云没什么不同。
Such a region is called a condensation and is represented by closely spaced dots .
这区域称为稠密区,并用密集的小点表示。
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