Staged vehicle
多级火箭
🧩 词语组成解析
a. 分期的
🗣️ 情景例句
I'm delighted to meet you, Mr. Peter.
皮特先生，很高兴认识你。
I hope you change his decision.
我希望你改变他的决定。
His talk covered many subjects.
他的报告涉及很多课题。