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- The Cassini orbiter and Huygens probe together form one of the biggest and heaviest planetary spacecraft ever built, with 12 scientific instruments on the orbiter and six on the probe [see inset in box on page 62]. 卡西尼号轨道船加上惠更斯号探测器，构成了有史以来最大且最重的行星太空船之一，轨道船上载有12具科学仪器，探测器上则有6具（见56页图）。
- planetary spacecraft propulsion system 行星空间飞行器推进系统
- Advanced Planetary Spacecraft System 先进的行星航天器系统
- The spacecraft is in orbit around the moon. 该航天器在绕月球轨道运行。
- The spacecraft was in its recovery mode. 这艘飞船处于返回状态。
- Do you know how an astronaut flies in a spacecraft? 你知道太空人是怎样乘太空船飞行的吗?
- The spacecraft splashed down in the Pacific. 那艘宇宙飞船溅落在太平洋中。
- The spacecraft is orbiting the moon. 宇宙飞船正绕月球飞行。
- The spacecraft rounded the moon. 太空船环绕月球飞行。
- planetary spacecraft 行星航天器
- Mission control ordered the spacecraft to return to earth. 指挥部命令宇宙飞船返回地球。
- Scientists are carefully charting the progress of the spacecraft. 科学家密切跟踪航天器的运行。
- The spacecraft is in orbit (ie moving in orbit) round the moon. 该航天器在绕月球轨道上飞行。
- A linkup of two orbiting spacecraft. 轨道上两个太空飞行器的会合
- The scientists calculated when the spacecraft would reach the moon. 科学家推算出宇宙飞船抵达月球的时间。
- Measured the planetary tilt in degrees. 测量地球倾斜的角度
- He formulated the theory of planetary movement. 他系统阐述了行星运动理论。
- Bad weather has frustrated plans to launch the spacecraft today. 今日发射宇宙飞船的计画，因天气恶劣而落空。
- Most planetary orbits are not circles but ellipses. 大多数行星的运转轨道是椭圆形而非圆形。
- Spacecraft are vehicles used for flight in outer space. 太空船是用于太空飞行的交通工具。
