Two-and-one-half minutes after the Apollo Eleven launch, the first-stage rocket separated from the spacecraft.
阿波罗11发射两分半钟后，第一级火箭从宇宙飞船中分离出来。
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。
South Korea launched a multi-stage rocket Tuesday in the country's first space shot, but the satellite it was carrying separated a few seconds later than planned and didn't reach the proper orbit.
韩国周二在该国的首次太空发射中发射了一枚多级运载火箭，但所携带卫星与火箭的分离时间比计划晚了几秒钟，卫星未能进入预定轨道。
The two-stage rocket, called Korea Space Launch Vehicle I or KSLV-I, blasted off at 5 p.m. into blue skies from the seaside Naro Space Center, near the city of Goheung on the country's south coast.
被称作“韩国航天运载器一号”的两级火箭是周二下午5时从韩国南部海岸高兴郡的罗老宇航中心发射升空的。
The two-stage rocket, called Korea Space Launch Vehicle I or KSLV-I, blasted off at 5 p. m. into blue skies from the seaside Naro Space Center, near the city of Goheung on the country's south coast.
被称作“韩国航天运载器一号”的两级火箭是周二下午5时从韩国南部海岸高兴郡的罗老宇航中心发射升空的。
The Shenzhou-VII mission entered the countdown stage after the final check on the spacecraft, the carrier rocket and the ground operation system was completed Tuesday morning.
在对飞船进行最后检查之后，神舟七号计划进入倒计时阶段。周二早上，运载火箭和地面操作系统已完成对接。
The rocket consists of a giant core stage flanked by two solid rocket boosters, each slightly larger than the first stage of Ares I.
火箭有一个巨大的核心，两侧是两个固体火箭助推器，每个比战神i的第一级稍微大一些。
The first stage, however, is equipped with parachutes and designed to splash down in the ocean? Much like shuttle rocket boosters? To be retrieved by a recovery ship.
第一级则配备了降落伞，降落在海中——很像航天飞机火箭助推器——由回收船搜寻回收。
The top half of the rocket is a dummy version, combining its upper stage and the Orion crew capsule, designed and weighted to mimic the real thing.
火箭的上半部分是个仿造品，把第一级和“猎户座”(Orion)乘员舱结合在一起，使其设计及重量与实际情况相若。
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.
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。
The rocket is long and slender, and fatter on top because its second stage is thicker than its solid rocket motor-powered first stage.
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 first stage of the two-stage Naro rocket was designed and built by Russia and the second by South Korea.
“罗老”号二级火箭的第一级由俄罗斯设计并建造，第二级由韩国负责。
NASA's double sledgehammer shot to the moon succeeded early this morning when an empty rocket stage and a lunar probe each crashed into separate craters.
随着一级空火箭和一个月球探测器分别撞击到月球表面不同的两座环形山上，美国航空航天局（NASA）的大型“双重撞月”行动在今天早晨取得了成功。
The two-stage Naro rocket operated normally during and after liftoff from the country's space center, Minister of Education, Science and Technology Ahn Byong-man said.
韩国教育、科学和技术部长安秉万称，“罗老”号二级火箭在自太空中心发射前后运作正常。
NASA plans to use a five-segment shuttle booster as the first stage of its Ares I rocket, one of two being designed as part of the post-shuttle Constellation program.
NASA计划用五级航天飞机助推火箭作为Ares I火箭的第一级，Ares i是淘汰航天飞机后的星座计划使用的两种火箭之一。
Thee Shenzhou-VII mission entered the countdown stage after the final check on the spacecraft, the carrier rocket and the ground operation system was completed Tuesday morning.
在对飞船进行最后检查之后，神舟七号计划进入倒计时阶段。周二早上，运载火箭和地面操作系统已完成对接。 。
After the first stage burns out it falls back to earth along a parabolic path while the engines of the second stage fire to thrust the rocket into an earth orbit.
当第一级烧毁后，沿抛物线的轨道落到地球，而第二级的发动机点火把火箭发射到地球轨道。
It's a two stage, 15 ton, solid fuel rocket that could instead carry a half ton penetrating, high-explosive warhead, along with the special guidance system (a radar and image recognition system).
它是一种二级、重量15吨固体燃料推进火箭可以改为携带一枚重量半吨的侵彻、高爆弹头，连同专用制导系统一起(一套雷达和图像识别系统)。
Perched on the shoulders of the booster is the second stage, the most powerful hydrogen-fueled rocket ever built .
放在助飞火箭上的是第二节，那是迄今制造的最强大氢燃料火箭。
One foreign rocket engineer calculates that the Long March 7 would need two of the 18-ton engines for its second stage.
一位外国火箭工程师的计算，长征7条将需要其第二阶段的18吨重的两个引擎。
The mission, aimed at putting India in a club of countries with the technology to put heavy satellites in orbit, failed when the rocket developed a snag soon after lift-off in the first stage itself.
这次发射旨在令印度跻身拥有发射重型卫星入轨技术的少数国家之列，但紧随着火箭点火发生的第一级故障使得这项目标落空。
In order to improve working reliability, increase grain mass, and achieve ignition and stage separation at the same time, a successful method is to apply an external igniter to solid rocket motor.
为了提高固体发动机工作可靠性，增加装药质量，同时实现二级点火和级间分离，应用体外点火器是一种成功的方法。
The $250-million launch facility where the rocket was set to lift off is being set as the stage for an ambitious space program, including long-range plans to land South Korean probes on the moon.
韩国斥资2亿5千万美元建造了这次火箭将升空的发射中心。发射设施是韩国雄心勃勃的太空项目的一部分，包括将来把韩国探测器送上月球表面的长远计划。
And a more satisfied result is obtained by analysing the living example of the structure reliability for some solid rocket motor at the test sample stage.
通过对某型号发动机试样阶段结构可靠性实例分析，得出了较满意的结果。
This can provide basis for the design of the stage separation part for a rocket and the thermal protection of the engine.
计算结果可为级间分离段和发动机热防护的设计提供参考。
The descent stage has eight rocket motors on its corners. These will slow its fall to a relatively sedate 0.75 metres a second.
下降段底部四周装有8个火箭发动机，能使下降速度达到每秒0.75米的稳定速度。
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，进入高层大气后即抛掉。
Viewers who were able to watch the launch on television could see the lift-off from the perspective of Odyssey's Delta II rocket, which had two video cameras attached to its 2nd stage.
能够在电视上观看发射情况的观众可以看到奥德赛从德尔塔II火箭发射升空的远景。火箭的第二级上安装了两台报像机。
Viewers who were able to watch the launch on television could see the lift-off from the perspective of Odyssey's Delta II rocket, which had two video cameras attached to its 2nd stage.
能够在电视上观看发射情况的观众可以看到奥德赛从德尔塔II火箭发射升空的远景。火箭的第二级上安装了两台报像机。
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