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
This vacation is for you and me.
这是我和你的假期。
You are right!
答对了。
'You'll have to get off here,' the conductor said.
“您得在这里下车，”售票员说，