contrails
📖 中文释义
- (contrail 的复数) n. 凝(结尾)迹
🧩 词形变化
原形 contrail
📘 English Definition（英文释义）
- plural of contrail
- n. 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