contrail
英 ['k?ntre?l]
美['kɑn,trel]
- n. 凝結(jié)尾；航跡云；凝跡（飛機(jī)飛過留下的尾跡）
英英釋意
- 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