保护地球免受太空陨石的侵害
文章来源:未知 文章作者:enread 发布时间:2020-10-11 05:27 字体: [ ]  进入论坛
(单词翻译:双击或拖选)
Do you want to find a meteorite1? Well, here is where to look – out on the Antarctic ice. The pristine2 white surface makes meteorites3 easier to see.
 
你想找一颗陨石吗?你可以在南极的冰面上试试!这里一尘不染的白色表面让陨石更容易被看到。
 
Alexander Gerst is part of a team hunting for rocks from space, which makes sense because he has spent a lot of his time up here.
 
He is a former commander of the International Space Station and has spent more time in orbit than any other European. But he is back on Earth searching for clues about the origin of our Solar System.
 
His boss on the ice gives me a lesson in how to find a meteorite.
 
So John has found more meteorites than anyone else. So we're going to simulate finding a meteorite – we've placed one on the snow over there, right? So we've been driving on the Ski-Doo. We've spotted4 it over there. What happens next?
 
Well, the next thing we'll do is walk over to confirm whether it is a meteorite or not.
 
So you're not allowed to touch it, are you?
 
You don't want to touch it – and we're upwind of it too – I don't want to drip my nose on it!
 
No, snot is the least of it. There are strict rules to ensure nothing contaminates the meteorites.
 
Most meteorites date back billions of years, right to the birth of the Solar System, so the research here helps us understand how the Earth itself was formed and it could also protect our planet.
 
Everybody knows that the dinosaurs5 came to extinction6 because of the big, big asteroid7 crashing into Earth and that was long ago but nowadays, still we have asteroids8 hitting Earth. Sooner or later, a bigger one is going to hit us. They're made of, in principle, the same stuff as some of these rocks that we find out there on the Polar plateau. If ever one comes straight at us and we realise that – well, we can only do something about that if we know exactly what it's made of.
 
For astronaut Alex, the rocks hold a personal significance.
 
You see things coming from outer space, zipping past you into the Earth's atmosphere and that's the weird9 thought when you, for the first time in your life, see a shooting star from above realising, hey, that thing just flew past me.
 
So his Antarctic trip kind of closes a circle. The astronaut has recovered the remains10 of shooting stars on Earth so we can understand our planet a bit better.


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1 meteorite 2wNy1     
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。
2 pristine 5BQyC     
adj.原来的,古时的,原始的,纯净的,无垢的
参考例句:
  • He wiped his fingers on his pristine handkerchief.他用他那块洁净的手帕擦手指。
  • He wasn't about to blemish that pristine record.他本不想去玷污那清白的过去。
3 meteorites 12efd1ed528a28fe1f7cb667a7fbc1e0     
n.陨星( meteorite的名词复数 )
参考例句:
  • Small meteorites have left impact craters all over the planet's surface. 这个行星的表面布满了小块陨石留下的撞击坑。 来自《简明英汉词典》
  • One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorites. 地球外存在生命的理论是基于陨星上存在碳化合物质这一事实的。 来自《简明英汉词典》
4 spotted 7FEyj     
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。
5 dinosaurs 87f9c39b9e3f358174d58a584c2727b4     
n.恐龙( dinosaur的名词复数 );守旧落伍的人,过时落后的东西
参考例句:
  • The brontosaurus was one of the largest of all dinosaurs. 雷龙是所有恐龙中最大的一种。 来自《简明英汉词典》
  • Dinosaurs have been extinct for millions of years. 恐龙绝种已有几百万年了。 来自《简明英汉词典》
6 extinction sPwzP     
n.熄灭,消亡,消灭,灭绝,绝种
参考例句:
  • The plant is now in danger of extinction.这种植物现在有绝种的危险。
  • The island's way of life is doomed to extinction.这个岛上的生活方式注定要消失。
7 asteroid uo1yD     
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。
8 asteroids d02ebba086eb60b6155b94e12649ff84     
n.小行星( asteroid的名词复数 );海盘车,海星
参考例句:
  • Asteroids,also known as "minor planets",are numerous in the outer space. 小行星,亦称为“小型行星”,在外太空中不计其数。
  • Most stars probably have their quota of planets, meteorids, comets, and asteroids. 多数恒星也许还拥有若干行星、流星、彗星和小行星。
9 weird bghw8     
adj.古怪的,离奇的;怪诞的,神秘而可怕的
参考例句:
  • From his weird behaviour,he seems a bit of an oddity.从他不寻常的行为看来,他好像有点怪。
  • His weird clothes really gas me.他的怪衣裳简直笑死人。
10 remains 1kMzTy     
n.剩余物,残留物;遗体,遗迹
参考例句:
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
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