Actually, contrails, short for condensation trails, are essentially clouds.

实际上，我们说的轨迹是凝结轨迹的简称，它本质上就是云。

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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。

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