轨道

• Trains run on rails .
  火车在轨道上行驶。
• Avalanches poured down on the tracks and rails were spread .
  雪崩压满了轨道，铁轨被弄得四分五裂。
• Let's suppose that the electron at first is in the normal orbit .
  让我们假设电子起初在基态轨道上。
• The orbits of such faint asteroids are not yet known .
  但是对于这样暗的小行星的轨道，迄今尚未弄清。
• To pin down the size of an orbital, we take a contour surface .
  为束缚住轨道的大小，我们取一等值面。
• Standing wave representations such as these are called atomic orbitals .
  这种驻波示意图叫做原子轨道。
• My thoughts were turned into the channel of their earlier bent .
  于是我旧情复萌，思想又转上原来的轨道。
• They were placed by a derrick mounted on rails on the bridge deck .
  它们由轨道上的转臂吊机吊放在桥面上。
• The orbits of the planets are ellipses with the sun at one focus .
  行星的轨道是以太阳作为焦点之一的椭圆。
• The russians plan to put a satellite into orbit round mars .
  俄国人计划把一颗人造卫星送入环绕火星的轨道。