Over the years, it has sent a number of increasingly challenging missions to the moon.

多年来，它已经安排了一系列越来越具有挑战性的月球飞行任务。

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Future: the vehicles could be used for missions to the moon or Mars.

这些未来的运载工具可用执行月球或火星任务。

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That analysis is expected to take a few weeks, but could prove significant for future human missions to the moon.

此项分析可能会持续数周时间，但是对日后人类探月行动却有着重大意义。

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And next year, the country is launching a small space lab to practice docking in orbit - an essential part of manned missions to the Moon and Mars.

VOA: standard.2010.04.21

"By twenty twenty-five, we expect new spacecraft designed for long journeys to allow us to begin the first-ever crewed missions beyond the moon into deep space.

VOA: special.2011.07.18

Kennedy delivered the speech just after several failed unmanned missions to the moon.

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Is it something you'd like to do or is it going to suffer from budget cuts to pay for missions to the moon and further to Mars?

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Clinton envisioned a national effort toward a new energy policy similar in scale to the Apollo program of the 1960s, which sent manned missions to the moon.

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