orbit

• Satellite lifetimes in orbit range from a matter of days to hundreds of years .
  卫星在轨道上的寿命从几天到几百年不等。
• They are moving through the regular ordained orbit of friends and relatives .
  走亲访友也已经成了他们神圣的日常例行公事。
• Other enumeration problems lead us to the study of orbits of permutation groups .
  其它的计数问题引导我们去研究置换群的轨道。
• This motion of an object in an orbit about a center is called revolution .
  像这种一个物体环绕某个中心所作的轨道运动叫做公转。
• The roche limit for the earth is a small fraction of the radius of the moon's orbit .
  地球的洛希极限相当于月球轨道半径的一小部分。
• The first two rangers, launched in 1961, never got out of earth orbit .
  最初的两艘游骑兵太空船，在1961年发射，始终没有脱离地球轨道。
• We may imagine the electron vibrating for a moment as it subsides into the smaller orbit .
  我们可以想象，电子跳入小轨道时振动一会儿。
• Apollo 8 was a test in which an apollo moonship was put into orbit around the moon .
  太阳神八号是将一艘登月艇纳入绕月球轨道的一项试验。
• Each planet traces an orbit around the sun as if no other planets were present .
  每一个行星绕着太阳作轨道运行，就像不存在其它行星那样。
• Let us test kepler's third law for the orbit of uranus compared with that of earth .
  让我们比较天王星和地球的轨道，来检验一下开普勒第三定律。