空中航線,通風孔
airway
n 1: a duct that provides ventilation (as in mines) [syn: {air
passage}, {air duct}]
2: a designated route followed by airplanes in flying from one
airport to another [syn: {air lane}, {flight path}, {skyway}]
3: a commercial enterprise that provides scheduled flights for
passengers [syn: {airline}, {airline business}]