详细解释:n. 飞越上空
英语解释：
名词 overflight:
a flight by an aircraft over a particular area (especially over an area in foreign territory)详细解释：
o.ver.flight
n.（名词）An aircraft flight over a particular area, especially over foreign territory.飞越上空：飞机在一特殊区域（尤指外国领域）上空的飞行