step-Rocket

常见例句

As the step rocket goes up,some of the stages at the side fall away.
当多级火箭上升时，边上的几级火箭就脱落了。
As the step rocket goes up, some of the stages at the side fall away.
当多级火箭上升时，边上的几级火箭就脱落了。
One of the ways to make step rockets is to put the stages side by side at the bottom.
制造多级火箭的一种方法是把各级火箭并排放在底部。
Rockets with more than one stage are called step rockets.
多于一级的火箭称为多级火箭。
These are two ways to make step rockets, one is to put the stages one on top lr the other.
有两种制造多级火箭的方法，一种是把一级放在另一级的项上。
These are two ways to make step rockets,one is to put the stages one on top of the other.
有两种制造多级火箭的方法，一种是把一级放在另一级的项上。