The shock wave and strong pulse noise, which produced by light rocket launcher, are belong to a non stationary signal process with a wide frequencies.
便携式火箭发射器所产生的冲击波和强脉冲噪声属非稳态信号，具有较宽的频率范围。
The object was too light to be a brick, but it was the same density as a piece of foam from a solid rocket booster.
这一物体太轻了而不可能是一个砖，然而它和固体燃料助推器上的泡沫的密度是相同的。
That means that, if you were travelling at the speed of light the whole time, it would take 4.2 years to get there "- or about 50, 000 years using current rocket science."
这意味着，如果你以光的速度履旅行，到那需要4.2年，或者用现在的火箭科学需要50,000年。
The Soyuz rocket, launched to carry a military communications satellite into orbit, created a spectacular light show as it passed over Ekaterinburg, the biggest city in Russia's Ural Mountains.
Soyus火箭携带了一颗将被送入地球同步轨道的军用通讯卫星升空。当它掠过俄罗斯乌拉尔群山中最大的城市叶卡捷琳堡时，制造了这场盛大的表演。
Imagine a rocket that can travel at the rate of light!
想象一下能以光的速度飞行的火箭。
Pilot Light: Ignite a rocket-jumping Soldier while he's in midair.
导航灯：点燃一个在半空中用火箭跳的士兵。
There exists an optimal exit area of secondary nozzle to result in a maximum thrust of rocket ejector in the light of the investigated ejector chamber structure.
在文中所研究的引射燃烧室结构条件下，存在一个最佳二次喷管出口面积，它能使引射火箭的推力达到最大。
There exists an optimal exit area of secondary nozzle to result in a maximum thrust of rocket ejector in the light of the investigated ejector chamber structure.
在文中所研究的引射燃烧室结构条件下，存在一个最佳二次喷管出口面积，它能使引射火箭的推力达到最大。
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