| 释义 |
step rocket短语¹¹⁴⁴⁶⁷⁺⁴
基本英英近义反义例句例句
n.多级火箭
Noun:
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近义词 multistage rocket多级火箭
用作名词Rockets with more than one stage are called step rockets.多于一级的火箭称为多级火箭。
As thestep rocketgoes 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。 An improved Soviet step rocket sent a heavy sputnik into its orbit.
苏联经过改进的多级火箭把一个重型人造地球卫星射入轨道。 huayuqiao.org |