single stage rocket 单级火箭 ; 单节火箭
two stage rocket 两级火箭
one-stage rocket 单级火箭 ; 一级火箭
two-stage rocket 双节火箭 ; 二级火箭 ; 两级火箭
recoverable-stage rocket 有回收级的多级火箭
final-stage rocket engine 末级发动机 ; 末级火箭发动机
final-stage rocket 末级火箭 ; 末级火箭发动机
second-stage rocket 第二级火箭 ; 火箭的第二级
single-stage rocket [航] 单级火箭
When reached 182 km, second stage rocket off automatically, reach a speed of 68 kilometers per second.
当达到182公里高度时，第二级火箭自动脱落，速度达到每秒68公里。
In 1969, AC Igniter plugs fire the second and third stage rocket engines that put the first me on the moon.
1969年，人类首次登月，AC火花塞引燃了第二和第三节火箭的引擎。
On the optimum mass ratios of two-stage rocket in the practical permissible region, we get the results analytic expression.
本文考虑二级火箭在实际允许区域内的最佳质量比问题，得到解的解析表达式。
Two-and-one-half minutes after the Apollo Eleven launch, the first-stage rocket separated from the spacecraft.
VOA: special.2009.07.15
They fired the third-stage rocket.
VOA: special.2009.07.15
He adds that the newer version has a shorter launch time, better deterrent capability, and that it is a two-stage rocket using solid fuel that is highly maneuverable.
VOA: standard.2009.12.18
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