noun🔗Share稀疏，稀薄化 A reduction in the density of a material, especially that of a fluid."The sudden rarefaction of air near the explosion caused a sharp drop in pressure that shattered nearby windows. "爆炸附近空气的突然稀薄化导致了气压的急剧下降，震碎了附近的窗户。physicsmaterialsubstanceChat with AIVocabulary GamePractice Reading
