It was China's first Mars program to make scientific researches about the soil, environment, atmosphere, water and so on.

这是中国第一个对土壤、环境、大气、水等进行科学研究的火星计划。

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Scientists who study Mars have laid down the program that they can follow.

研究火星的科学家们已经制定了他们可以遵循的计划。

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The early spacecraft that landed on Mars were thoroughly sterilized. But as money for the space program got tight, the expensive cleansing process was cut back.

早期登陆火星的航天器都经过了彻底杀菌，但是当用于太空计划的资金变得紧张起来的时候，这种花费高昂的清洁程序就被削减了。

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You can listen to part four of the science fiction story "A Princess of Mars" on our program AMERICAN STORIES this Saturday.

VOA: special.2010.07.28

He began a program of observing not only Mars, but also Venus and Mercury.

VOA: special.2010.07.11

Michael Meyer is lead scientist for NASA's Mars Exploration Program in Washington.

VOA: special.2009.12.30

On a screen behind the lectern at the briefing, Doug McCuistion, the director of the Mars program, projected a poster with a halftime score on it: Mars 24, Earth 15.

NEWYORKER: The Martian Chroniclers

Late in the fall, during a rare lull in his work on the Mars program, Grotzinger and I took a drive to Death Valley due east from his house in lush San Marino, across the front range of the San Gabriels, past Apple Valley and Barstow, and down into the great basin of the Mojave.

NEWYORKER: The Martian Chroniclers

Dr. LEVINE: Ira, every four years NASA solicits proposals for a program called the NASA Mars Scout Program.

NPR: Revisiting the Viking Missions to Mars