contrail

飞行云, 轨迹

[航空]凝结尾(飞机在晴冷而潮湿的空气中飞行时在尾部所形成的一条类似云带物)

contrail

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

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