Staged vehicle
多级火箭
🧩 词语组成解析
a. 分期的
🗣️ 情景例句
Sure. We've been in business about five years now.
当然。我们创业至今有五年的历史。
I would like to call an eletrician to come this afternoon.
我要叫一个电器师傅今天下午来。
That's right.
不，是我。