rarefaction /.rєәri'fækʃәn/ GRE英语词汇 📖 中文释义 n. 稀薄化, 稀薄[医] 稀疏[状态], 疏松[状态] 🔗 释义中的汉语词稀薄稀疏疏松 🧩 词形变化 复数 rarefactions 📘 English Definition(英文释义) n. a decrease in the density of something ← raree-show R 字母词表 rarefaction of bone →