It has a strong space science effort under way, with two orbiting satellites having already been launched to the Moon and a third mission expected to put a rover on the lunar surface.

它正在进行一项宏伟的空间科学工作，已有两个轨道卫星被发射到月球上，而第三项任务预计将在月球表面投放探测车。

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An explosion on board the spacecraft two days into Nasa's third mission to the Moon left the three astronauts in grave danger.

登月飞船上的舱内爆炸发生在美国航空航天局第三个月球任务开始后的两天，将三名宇航员置于了危难中。

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The Apollo 13 mission was slated to be the third lunar landing.

VOA: standard.2010.04.04

It comes from The Sound the Speed the Light, Mission of Burma's third post-reunion album, out Tuesday.

NPR: Mission Of Burma: The Story Begins Again

The spacecraft will have enough propellant left after the extended mission to potentially allow a third phase of operations.

BBC: Nasa extends Saturn probe mission

Curiosity went through its paces "flawlessly" on its third full day on the planet, mission manager Michael Watkins said Thursday.

CNN: Mars panorama shows Curiosity's prime target