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。
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。
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。
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。
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 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。
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。
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 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。
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