Rarefactions
(rarefaction 的复数) n. 稀薄化, 稀薄\\n[医] 稀疏[状态], 疏松[状态]
🗣️ 情景例句
He started out on a voyage around the world.
他开始周游世界。
He ran like hell.
他拼命跑。
Though the sound could be heard clearly, it took me a long time to react.
虽然声音听得很清楚，但我过了好一会儿才作出反应。