contrailn. 凝(結尾)跡學術名詞凝結尾：航空太空、氣象學、機械工程凝結軌跡：物理學凝結尾[跡]：海事英文釋義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