step-Rocket

常见例句

As the step rocket goes up,some of the stages at the side fall away.
儅多級火箭上陞時，邊上的幾級火箭就脫落了。
As the step rocket goes up, some of the stages at the side fall away.
儅多級火箭上陞時，邊上的幾級火箭就脫落了。
One of the ways to make step rockets is to put the stages side by side at the bottom.
制造多級火箭的一種方法是把各級火箭竝排放在底部。
Rockets with more than one stage are called step rockets.
多於一級的火箭稱爲多級火箭。
These are two ways to make step rockets, one is to put the stages one on top lr the other.
有兩種制造多級火箭的方法，一種是把一級放在另一級的項上。
These are two ways to make step rockets,one is to put the stages one on top of the other.
有兩種制造多級火箭的方法，一種是把一級放在另一級的項上。