step rocket

漢語翻譯

英文解釋：

名詞 step rocket:

1. a rocket having two or more rocket engines (each with its own fuel) that are fired in succession and jettisoned when the fuel is exhausted
   同義詞：multistage rocket

例句：

1. One of the ways to make step rockets is to put the stages side by side at the bottom.
   製造多級火箭的一種方法是把各級火箭並排放在底部。