英语听力：自然百科 行星旅行指南：火星 Mars—10

 But still be able to use your hands. Not only will you want to move your fingers, you want to move around. NASA’s lunar electric rover is a prototype for future missions to the moon and Mars. It’s part vehicle and part space suit. 

 

I can just picture being there in a vehicle this type and looking back at earth in the distance and deciding to go AVA and BM boots on the surface in 10 minutes with which just being a remarkable¹ breakthrough. 

 

Astronauts can cover more ground by living in the vehicle for weeks at a time. Stepping outside when they want to and back inside at the first sign of danger. Mars does not have a powerful magnetic field the way earth does. So there is radiation from the sun, also cosmic rays that are gonna penetrate² through space suits.  

 

An astronaut might get a 30 minute warning of an incoming solar storm. But less predictable is the risk of being hit by a meteorite³. Recent estimates based on fresh equator counts suggests that up to 200 new holes are blasted into the surface of Mars each year, and even the Martian moons are not guaranteed to stay in place. The days of Phobos are numbered. Possibly in asteroid⁴ that once stray too close, the moon is trapped in a gravitational embrace. Every passing century sees a drop of 6 feet closer to death. In about 50 million years, its fall is expected to be complete. 

 

The aftermath if anyone is around to see it, could be Mars with a bright ring of moon dust to rival Saturn’s.  But events like this are not your real danger; it’s the day to day exposure to the cold, dry Martian environment that will make a long stay tricky⁵.

1 remarkable   

adj.显著的，异常的，非凡的，值得注意的

参考例句：

• She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
• These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。

2 penetrate   

v.透(渗)入；刺入，刺穿；洞察，了解

参考例句：

• Western ideas penetrate slowly through the East.西方观念逐渐传入东方。
• The sunshine could not penetrate where the trees were thickest.阳光不能透入树木最浓密的地方。

3 meteorite   

n.陨石；流星

参考例句：

• The meteorite in Jilin Exhibition Hall is believed to be the largest in the world.吉林展览馆的陨石被认为是世界上最大的。
• The famous Murchison meteorite smashed into the Australian ground in 1969.1969年著名的默奇森陨石轰然坠落在澳大利亚。

4 asteroid   

n.小行星；海盘车(动物)

参考例句：

• Astronomers have yet to witness an asteroid impact with another planet.天文学家还没有目击过小行星撞击其它行星。
• It's very unlikely that an asteroid will crash into Earth but the danger exists.小行星撞地球的可能性很小，但这样的危险还是存在的。

5 tricky   

adj.狡猾的，奸诈的；(工作等)棘手的，微妙的

参考例句：

• I'm in a rather tricky position.Can you help me out?我的处境很棘手，你能帮我吗？
• He avoided this tricky question and talked in generalities.他回避了这个非常微妙的问题，只做了个笼统的表述。