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substratosphere n.【航空】亞[副]平流層;亞[副]同溫層。

substratum

An airplane with the ability to fly into the substratosphere across the country 一架能在亞同溫層上飛遍全國的飛機

An airpiane with the abiiity to fiy into the substratosphere across the country 一架能在亞同溫層上飛遍全國的飛機