... 启动 firing; pulse-on; commission ... 火箭级 rocket stage 逐级启动的多级火箭 step-by-step rocket ...
基于3个网页-相关网页
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火箭级间分离模拟 Rocket Separate Simulation
核火箭级 nuclear rocket stage
运载火箭级 vehicle stage ; launch-vehicle stage
单级火箭 single stage rocket ; one-stage rocket
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火箭的级 rocket stage
两级火箭 two stage rocket
日志也记录了杂乱无章的太空中发生的一些虚惊事件：弃用的火箭级、覆盖层以及脚固定环都曾擦身而过。
The logs also included near-misses in the clutter of space: old rocket-stages, blankets and foot restraints, all orbiting past.
NASA需要好天气来发射战神I-X，因为工程师们要在第一级火箭分离前观测火箭飞行全过程，第一级火箭分离标志着试飞的结束。
NASA needs good weather to launch Ares I-X because engineers need to see the rocket flight all the way through first stage separation, which will mark the end of the test.
火箭又长又细，上部有点粗，因为它的第二级比固体燃料火箭发动机驱动的第一级要厚。
The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.
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