英语听力：自然百科 行星旅行指南：火星 Mars—14（在线收听） |
When we reconstruct our imaginations, Mars are 3 billion years ago. We tend to make it like Earth, warm and clozzying, but it wasn't. Mars back in its wettest warmth face which probable like Earth today in its coldest regions. So I'm imagining a place where snow and ices melting in the summer deform tracing and pounds of strings of ice-covered lakes. Its cold, its wet, but it could be rich with life. This is the Mars that we want our astronauts to get there hands on, to bring back and study the weep Mars of odd where we might find the evidence of life. The fourth rock from the sun has always had a special car to play, the chances of meeting Martians. And in recent years, the odds of a closing counter have been steadily improving. If you want to find life on Mars, first you need to find water. And not all of the planet's water story is inch history. There's been plenty of frozen underground evidence detected from orbit, but scientists need to touch and test to be sure.
In 2008, they finally got their opportunity when NASA's Flanders made it daring approach to the high Martian Arctic.
There was not ever more excited be in my life of landing in safely on Mars. I will be through the opposite, I will be through a landing was not successful, and I didn't want them to happen again.
The landing was not only perfect, but the engine expose suspicious wet patches directly underneath the spacecraft. Water eyes was just a few scrays away.
We did find water ice and we found the soiling connection to it has caulsing carbonate, a compound at forms in the presents of liquid water. |
| 原文地址：http://www.tingroom.com/lesson/zrbaike/2012/260585.html |