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
And your friends are planning to go to Columbia?
而且你的朋友们也准备上Columbia大学 ，对吗？
It's hard to say.
很难说。
Sam and Lin Tao meet outside the school gate.
山姆和林涛在校门口相遇。