英语听力精选进阶版 13946

'Ice volcano' found on Saturn's moon

Summary

17 December 2010

Saturn’s largest moon, Titan, is made up mainly of water, ice and mountains. Now scientists think they’ve found a mountain that spews lava¹ made not of molten rock, but ice. The observation was announced at the American Geophysical Union meeting in San Francisco. Jonathan Amos reports.

Reporter:

Jonathan Amos

Report

Titan is a mysterious world. Because it's shrouded² in a thick, oily haze³, it's extremely hard to identify anything at the moon with confidence. But with temperatures that plunge⁴ to minus 180 Celsius⁵ at the surface, researchers had suspected it might have ice volcanoes. 

And now the Cassini probe has spotted⁶ a 1,500m-high mountain with a deep pit in it, and what looks like a flow of material nearby. 

Scientists can only speculate what sort of material a cryo-volcano might erupt, but the complex chemistry at Titan suggests it could be a slushy water-ice containing ammonia.

If there are a lot of carbon molecules⁷ present, the lava could even look like softened⁸ asphalt, candle wax or even polyethylene. 

The team which discovered the mountain have dubbed⁹ it "the Rose".

Jonathan Amos, BBC News

1 lava   

n.熔岩，火山岩

参考例句：

• The lava flowed down the sides of the volcano.熔岩沿火山坡面涌流而下。
• His anger spilled out like lava.他的愤怒像火山爆发似的迸发出来。

2 shrouded   

v.隐瞒( shroud的过去式和过去分词 )；保密

参考例句：

• The hills were shrouded in mist . 这些小山被笼罩在薄雾之中。
• The towers were shrouded in mist. 城楼被蒙上薄雾。 来自《简明英汉词典》

3 haze   

n.霾，烟雾；懵懂，迷糊；vi.(over)变模糊

参考例句：

• I couldn't see her through the haze of smoke.在烟雾弥漫中，我看不见她。
• He often lives in a haze of whisky.他常常是在威士忌的懵懂醉意中度过的。

4 plunge   

v.跳入，(使)投入，(使)陷入；猛冲

参考例句：

• Test pool's water temperature before you plunge in.在你跳入之前你应该测试水温。
• That would plunge them in the broil of the two countries.那将会使他们陷入这两国的争斗之中。

5 Celsius   

adj.摄氏温度计的，摄氏的

参考例句：

• The temperature tonight will fall to seven degrees Celsius.今晚气温将下降到七摄氏度。
• The maximum temperature in July may be 36 degrees Celsius.七月份最高温度可能达到36摄氏度。

6 spotted   

adj.有斑点的，斑纹的，弄污了的

参考例句：

• The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
• Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。

7 molecules   

分子( molecule的名词复数 )

参考例句：

• The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
• Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

8 softened   

（使）变软( soften的过去式和过去分词 )； 缓解打击； 缓和； 安慰

参考例句：

• His smile softened slightly. 他的微笑稍柔和了些。
• The ice cream softened and began to melt. 冰淇淋开始变软并开始融化。

9 dubbed   

v.给…起绰号( dub的过去式和过去分词 )；把…称为；配音；复制

参考例句：

• Mathematics was once dubbed the handmaiden of the sciences. 数学曾一度被视为各门科学的基础。
• Is the movie dubbed or does it have subtitles? 这部电影是配音的还是打字幕的？ 来自《简明英汉词典》