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
The Thanksgiving Day parade is always such great fun.
感恩节的游行总是如此有趣。
Kill two birds with one stone.
一举两得。
Check your answers with mine.
把你的答案跟我的核对一下。