Staged vehicle
多级火箭
🧩 词语组成解析
a. 分期的
🗣️ 情景例句
It's not good enough to show.
还不值得展示。
A wise man needs not blush for changing his purpose.
智者不耻于改变初衷。
I can set up a tour next week.
我可以安排在下个礼拜参观。