Valleculae
n. （线）沟( vallecula的名词复数 )
🗣️ 情景例句
Well, I'd describe it as a book which is a ...
嗯， 我会把这本书形容一幅……
Step by step the ladder is ascended.
登梯需要逐级登。
But what else?
但它还传递别的什么呢？