There is no appetite to return to the moon, let alone push on to Mars, El Dorado of space exploration.

没有了重返月球的愿望，更不用说推动去传说中的黄金国火星的空间探索。

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The ultimate aim is a mission to return Mars rock and soils to Earth labs.

最终的目标是将火星岩石和土壤样本带回地球实验室。

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was supposedly going to be a return mission to the moon followed by a trip to Mars.

据称乔治•布什时代的星座项目是继火星之旅后将是一个恢复到月球的任务。

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"It has so much capability, so much more capability than any other vehicle, that I think we can start to contemplate missions like a Mars sample return, which requires a tremendous amount of lift capability because you've got to send a lander to Mars that still has enough propellant to return to Earth."

VOA: special.2011.04.11

He favors a project to send people to Mars, but he also wants to see American astronauts return to the one place he never reached, the surface of the moon.

VOA: standard.2010.04.04

It also stressed the need to return samples from Mars to Earth, so they could be fully analyzed by multiple scientists.

CNN: What we've done on Mars, and what's next

At NASA, Hubbard's goals included understanding Mars as a system, looking for potentially habitable environments, examining whether the planet was habitable in the past and preparing to return samples from Mars to Earth.

CNN: What we've done on Mars, and what's next

There is no appetite to return to the moon, let alone push on to Mars, El Dorado of space exploration.

ECONOMIST: Inner space is useful. Outer space is history