Staged vehicle
多级火箭
🧩 词语组成解析
a. 分期的
🗣️ 情景例句
Yes.
是的。
She is the most gracious hostess I have ever known.
她是我所见过的最和蔼的女主人。
It will help me understand the point you are trying to make.
这会帮助我了解你们的重点。