Staged vehicle
多级火箭
🧩 词语组成解析
a. 分期的
🗣️ 情景例句
So it's just you and me, Susan.
所以 这里只有你和我， Susan。
I would like to cancel the reserved seat.
我要取消已预定的位置。
It was like stepping into a secret art museum, in which we were the only visitors.
就像是走进入了一个秘密的艺术博物馆，我们是馆内唯一的游客。