exhaust trail

exhaust-trail的词性：
n.（名词）

1. A condensation trail that is visible when water vapor in aircraft exhaust mixes with the air in the vehicle's wake and saturates it.
排气尾迹：飞机排出的水汽与飞机尾部空气相混合而达到饱和时形成的可见的凝结尾迹