火箭

• They traded stories about the problems of sending rockets to the moon .
  他们彼此谈了一些把火箭送上月球的事。
• He would have no qualms about using missiles to unleash a nuclear war .
  他会毫无顾忌地利用火箭发动一场核战争。
• We can rule out interstellar rockets, because they are far too slow .
  我们可以把星际火箭除去，因为它们太慢了。
• Rockets and artificial satellites can go far above the ionosphere .
  火箭和人造卫星能够到达电离层以上极远的地方。
• The feed system of a rocket engine may be the cause of undesirable oscillations .
  火箭供应系统可能是有害的振源。
• A rocket is propelled by the ejection of a portion of its mass to the rear .
  火箭是靠向后喷射其部分质量而推进的。
• Hypergolic ignition systems bear many resemblances to hybrid rockets .
  自然式点火系统在很多方面与混合型火箭相似。
• For this we developed two new devices, rockets and aerial mines .
  因此，我们便发明了两种新武器火箭和空中布雷。
• In a short time interval, a mass dm of gas is ejected from the rocket .
  在很短的时间内，由火箭喷射气体的质量为dm
• It takes 30 minutes for a missile to go from one continent to another .
  一枚火箭只要三十分钟便可以从一洲射到另一洲。