基本解释

• [交通運輸工程]衛星運行周期

英汉例句

權威例句

• To do this the satellite would need to be in a synchronous orbit (one whose orbital period is the same as the period of revolution of the planet underneath), and the descending cable would have to be counterbalanced by an ascending one extending off into space.
  ECONOMIST: Space lifts

专业释义

交通運輸工程

• 衛星運行周期