火箭

• It is reasonable that this result should be generally applicable also to liquid-propellant rockets .
  这个结果通常也应适用于液体推进剂火箭。
• The rocket ship is divided into two parts, the payload part and the fuel-exhaust part .
  把火箭飞行器分为两部分：有效负载部分和燃料排出部分。
• The big satellite missiles make most of the headlines in the story of rocket development .
  这类大型的卫星导弹成了火箭研制史上的大部分头条新闻。
• Sounding rockets would be useless if they were unable to send information back to the earth .
  高空探测火箭如果不能把资料送回地面，那就没有什么用处了。
• The air molecules making up the earth's atmosphere create friction and tend to slow a rocket .
  组成地球大气层的空气分子会产生摩擦力，并会促使火箭减速。
• The burning surface of the powder then increases, the pressure rises and the rocket may be blown up .
  此时，无烟药燃烧表面增加，压力上升，火箭可能爆炸。
• The rocket climbs upward and onward, with an artificial satellite cradled in its nose cone .
  随带装在其前端锥形体内的一颗人造卫星，火箭一直向上，向前爬升。
• Ultraviolet sensitive photocathodes are also used in cameras in rocket and balloon-bome experiments .
  火箭和气球实验的电子照相机中，还使用紫外敏感的光电阴极。
• Many rockets have been launched for the sole purpose of learning something about our earth and universe .
  许多火箭的发射只是为了获悉有关地球和宇宙的某些情况。
• The greater the exhaust velocity is, the faster the rocket travels as it smashes through the atmosphere .
  排气速度越大，火箭在冲出大气层时的飞行速度也就越快。