空中in the sky;in the air;aerial;overhead
～补给air-supply;air-resupply /～待战air alert/～飞人（杂技）flying trapeze/～封锁aerial blockade/～劫持aerial hijacking/～警戒air alert/～楼阁castles in the air/～桥梁air bridge;airlift /～识别区air identification zone/～摄影aerophotography;aerial photography/～视察aerial inspection/～小姐 （空姐）air hostess;air stewardess/～掩护air umbrella;air cover (for the infantry)/～优势air superiority/～预警airborne early warning;AWACs/～侦察aerial reconnaissance/～走廊air corridor;air lane/～加油air refueling;inflight refueling /～加油机aerial refueller;inflight refueller;tanker plane/～交通管制air traffic control/～警报和控制系统airborne warning and control system/～客车air bus;Airbus/～快线express flights |