2020年翻译资格考试二级（中级）笔译实务练习题及参考答案（3）
2020-03-20 16:21:30   来源：环球教育在线   评论：0 点击：

　　Scientists have found the first evidence that briny water flowed on the surface of Mars as recently as last summer, a paper published on Monday showed, raising the possibility that the planet could support life.

　　Although the source and the chemistry of the water is unknown, the discovery will change scientists’ thinking about whether the planet that is most like Earth in the solar system could support present day microbial life.

　　The discovery was made when scientists developed a new technique to analyze chemical maps of the surface of Mars obtained by NASA’s Mars Reconnaissance Orbiter spacecraft.

　　They found telltale fingerprints of salts that form only in the presence of water in narrow channels cut into cliff walls throughout the planet’s equatorial region.

　　The slopes appear during the warm summer months on Mars, then vanish when the temperatures drop. Scientists suspected the streaks were cut by flowing water, but previously had been unable to make the measurements.

　　Mars Reconnaissance Orbiter makes its measurements during the hottest part of the Martian day, so scientists believed any traces of water, or fingerprints from hydrated minerals, would have evaporated.

　　Also, the chemical-sensing instrument on the orbiting spacecraft cannot home in on details as small as the narrow streaks, which typically are less than 16 feet wide.

　　But Ojha and colleagues created a computer program that could scrutinize individual pixels. That data was then correlated with high-resolution images of the streaks. Scientists concentrated on the widest streaks and came up with a 100 percent match between their locations and detections of hydrated salts.

　　周一发表的一篇文章说，科学家在火星表面最近的夏天发现有盐水流过的痕迹，这项发现增加了火星可繁育生命的可能性。

　　火星是太阳系中与地球最相似的行星。虽然上述盐水的水源与成分仍旧是个迷，但是这项发现将会改变科学家关于火星能否繁育当今的微生物的想法。

　　科学家们发明了一项新技术，用来分析由美国国家航空航天局的火星勘测轨道飞行器获取的火星表面化学成分图，这才有了这项发现。

　　在火星赤道区域崖壁上的狭窄深沟里，科学家发现了最能说明问题的盐迹，而盐需要水才能存在。

　　在温暖的夏季月份，这些斜坡才会出现，随着气温降低，斜坡渐渐消失。科学家们怀疑这些条纹是由于流水侵蚀而成的，但在先前无法进行测量。

　　火星勘测轨道飞行器在火星最炎热的时候，勘测了深沟，所以科学家认为，任何的水源，或者含水矿物在那时都已蒸发殆尽。

　　此外，火星勘测轨道飞行器上的化学探测仪器无法传回像条纹那样细小的详细信息，而这些条纹通宽度常不到16英尺。

　　但是，欧贾(Ojha)与同事们发明了一个可以仔细分析每个像素的计算机程序。然后，利用这些像素数据与高分辨率的条纹图片进行比对。科学家聚焦火星上最宽的那些条纹图片，得到了一个条纹位置与含水盐发现位置100%匹配的结果。