变温层 Traditional form: 變溫層 Pinyin (reading): biànwēncéng Definitions: troposphere lower atmosphere Characters: 变 - to change, to transform, to alter; rebel 温 - warm, lukewarm 层 - layer, floor, story, stratum Traditional characters: 變 - to change, to transform, to alter; rebel 溫 - warm, lukewarm 層 - layer, floor, story, stratum