英语听力：自然百科 行星旅行指南：火星 Mars—12
时间：2014-05-29 07:03:06
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（单词翻译）
Try the red planet for sight-seeing on an enormous scale. Thanks to our sharp-eyed spacecraft, Mars is opening up like never before. These are real landscapes that humans will one day marvel1 at in person.
“You know, if you’re going to Mars, you’re going to go for the scenery, right? I mean you’re not going for the culture, you’re not going for the climate. So you’re definitely going for the scenery.”
One thing that people forget is that when’ve landed on Mars, we have to go to places that are safe and safe equals, pretty smooth and flat. Here’s a bit of Mars that’s anything but smooth and flat, the magnificent Valles Marineris. This
titanic2 canyon3 system, over 2,500 miles long and six miles deep, is probably the grandest geological feature in the solar system. It’s clearly the red planet’s must-see destination.
“As a human being, it’s the sheer gigantism of Mars that is amazing. The Valles Marineris is bits the Grand Canyon all over, and if you’ve ever seen the Grand Canyon, you will never forget it.”
It’s so
colossal4. The Grand Canyon would be easily swallowed by one of the smaller side branches.
“We’re talking about something here that’s the width of the United States or Australia crossed here.”
“Something to Valles Marineries would be a place to go, and build a large
radar5 on the room you can look in.”
The attraction goes beyond sheer
scenic6 splendor7. Deeper than the canyon itself, is the mystery surrounding its formation. This giant
fissure8 once filled by
mighty9 lakes has been
scoured10 by floods of biblical proportions.
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