1.
Rockets with more than one stage are called step rockets.
多于一级的火箭称为多级火箭。
2.
the first stage of a multistage rocket.
多级火箭的早期阶段。
3.
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。
4.
These were rockets with more than one engine.
多级火箭是装有一台以上发动机的火箭。
5.
One of the ways to make step rockets is to put the stages side by 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。
6.
At the sound of the pistol, the crew got off excellently.
多级火箭的最大级给出的第一次大推动，使得各级火箭全部离开地面。
7.
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。
8.
The primary stage of a multistage rocket that provides the main thrust for launch, liftoff, and initial flight.
助推器多级火箭的第一级，为发射、升空和最初飞行提供主要推力
9.
LINEARIZED MASS EQUATION FOR MULTI-STAGE VEHICLE WITH SERIES OR PARALLEL PROPULSION SYSTEM
串联与并联推进多级运载火箭线性化质量方程
10.
dual thrust rocket engine
双级推力火箭发动机
11.
timing of stage separating
火箭级分离程序定时
12.
The second rocket has divorced itself from the first spent rocket
第二级火箭已经脱离已燃尽的第一级火箭。
13.
Design and optimization of multi-stage solid launch rocket based on integrated stage concept
基于整体级概念的多级固体运载火箭设计与优化
14.
single-burn ascent
单级点火上升,用单级火箭送上轨道
15.
The rocket rises and we can see the second stage ignite.
火箭升高了，我们可以看到二级点火。
16.
ABRV (Advanced Ballistic Re-entry Vehicle)
高级弹道重返大气层运载火箭
17.
Basic parameters analysis of first stage engine system for heavy lift vehicle
重型火箭下面级发动机基本参数分析
18.
The first-stage vehicle is used to launch the rocket and is then jettisoned in the upper atmosphere.
第一级运载火箭是用来发射火箭的, 进入高层大气後即抛掉.