| 释义 |
- n.
1 an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust 同义词：contrail
- 1
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。 - 2
The white trails look vaguely like the condensation trails, or contrails, left behind by airplanes, but they actually result from ship exhaust. 白色的痕迹疑似飞机留下的凝结尾迹或飞行云，但它们实际由轮船留下。 - 3
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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