noun🔗Share散逸层，外逸层 The uppermost layer of a planet's atmosphere"Satellites orbit Earth within the exosphere, where the air is extremely thin. "人造卫星在地球的散逸层内运行，那里的空气极其稀薄。spaceastronomyenvironmentscienceweatherChat with AIVocabulary GamePractice Reading
noun🔗Share外逸层，散逸层 An extremely thin atmosphere, as on Saturn's moon Dione"Because Saturn's moon Dione has such a weak and thin atmosphere, scientists classify it as an exosphere. "由于土星的卫星土卫四拥有如此稀薄的大气层，科学家将其归类为外逸层/散逸层。astronomyspacescienceenvironmentChat with AIVocabulary GamePractice Reading
