Photographic evidence suggests that liquid water once existed in great quantity on the surface of Mars.
照片证据表明，液态水曾大量存在于火星表面。
During spring and summer, the surface of Mars is covered by strong storms.
在春季和夏季，火星表面被强风暴覆盖。
The surface of Mars shows a wide range of geologic features, including huge volcanoes—the largest known in the solar system—and extensive impact cratering.
火星表面显示出广泛的地质特征，包括巨大的火山——太阳系中已知的最大的火山——和广阔的撞击坑。
The Mariner spacecraft found that the surface of Mars, as well as that of its two moons, is pitted with impact craters formed by meteoroids falling in from space.
水手号宇宙飞船发现火星表面，还有它的两个卫星表面，都有由太空坠落的流星体造成的陨石坑。
The surface of Mars is remarkably diverse.
火星的表面参差不齐。
The spacecraft carried instruments to examine the surface of Mars.
宇宙飞船运载了检测火星表面的的仪器。
Both spacecraft photographed the surface of Mars and sent images back to NASA.
这两架航空器拍摄了火星表面的照片并将图像发回NASA。
The gravity on the surface of Mars is about one third as strong as it is on earth.
火星表面的引力大约是地球表面引力的三分之一。
NOT much is known about the sea, it is said; the surface of Mars is better mapped.
我觉得它这个意思是说，人们对海洋缺乏应有的了解，甚至不及对对火星的了解多。
The gravity on the surface of Mars is about two-fifths as strong as it is on earth.
火星表面的引力大约是地球表面引力的五分之二。
A vast ocean once covered a third of the surface of Mars, scientists revealed last night.
昨晚，科学家表示，广阔的海洋曾经覆盖了火星表面三分之一的面积。
We are trying to find out more about the surface of Mars and about satellites of Saturn.
我们正试图找出更多有关火星表面的，对卫星的土星之旅。
Recent orbital images show that water might still occasionally flow on the surface of Mars.
最近的轨道照片显示水仍然偶尔流过火星表面。
The surface of Mars is more like the surface of Earth than any other planet in our solar system.
火星的表面比太阳系中其他任何行星更像地球。
On July 20, 1976, spacecraft Viking 1 captured this, the first photograph ever taken of the surface of Mars.
1976年7月20日，海盗-1号捕捉到有史以来第一张火星表面图。
If verified, this finding would be consistent with having methanogens living below the surface of Mars.
这项发现一旦经确认属实，将与火星表面下存在产甲烷菌的说法不谋而合。
The lakes are now dry but the depressions on the surface of Mars which they created remain, Mr Gupta said.
先生说，这些湖泊现在干涸了，但是它们在火星表面形成的洼地依然存在。
In 2001 NASA created the experimental Clickworkers project to locate and categorize craters on the surface of Mars.
在2001年，美国航空航天局启动了试验性的的“点击研究者”项目，这一工程用来定位火星表面的坑状物并加以进行分类。
You can witness a total eclipse from the Moon, watch the Sun set from the surface of Mars, or even ride a comet.
你可以从月亮上目击整个日全食的过程，可以看到火星表面的落日，甚至控制一颗彗星。
NASA currently has one rover working on the surface of Mars and plans to launch another mobile geology station in November.
NASA现在有一台正在火星表面工作的火星车，并计划于11月再发射另一个可移动地质学观测平台。
It is a truism that scientists know more about the surface of Mars than they do about the surface of the Earth, but it is also true.
科学家们对火星表面的了解甚于他们对地球表面的了解，这句话听上去难免觉得有些老套，但也是事实。
Either way, if contact can't be re-established in the next month or so then Spirit will be abandoned on the cold surface of Mars.
无论什么情况，如果在下个月左右不能重新建立联系的话，勇士号就会被抛弃在火星的寒冷地面上。
To see the surface of mars, you need an astronomical telescope. it appears as a bright orange - red spot when seen with naked eye.
要欣赏火星的表面，需要天文望远镜的帮助，以肉眼观看，火星将会是一明亮的橙红色光点。
When other satellites photographed the surface of Mars, the pictures of the Cydonia region revealed that the face was just an eroded mesa.
后来其他卫星也对火星表面拍摄了照片，而塞东尼亚地区后来拍摄的照片揭示那张脸只不过是风化了的平顶山。
Continuing the theme of space breakthroughs, one of the biggest discoveries of the year was the ice buried beneath the surface of Mars.
继续太空突破的主题，火星表层下发现了冰也是今年最大的突破之一。
But this result suggests quite strongly that even as long as four billion years ago, the surface of Mars would have been challenging for life.
但这一结果充分说明，即使在40亿年前，火星表面的生存环境仍然很恶劣。
In just the past few years, scientists have confirmed the presence of ice at the moon's North Pole as well as beneath the surface of Mars.
在刚刚过去的几年里，科学家们已经证实在月球的北极和火星表面的下面都有冰的存在。
In just the past few years, scientists have confirmed the presence of ice at the moon's North Pole as well as beneath the surface of Mars.
在刚刚过去的几年里，科学家们已经证实在月球的北极和火星表面的下面都有冰的存在。
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