单词：Boxhole Meteorite Crater
单词：Boxhole Meteorite Crater 相关文章
Japanese Spacecraft Arrives at Asteroid to Study Surface A Japanese spacecraft arrived at an asteroid Wednesday after traveling for more than three years. The Hayabusa2 spacecraft is to perform a new experiment. It will create a crater on the asteroi
2018年VOA慢速英语(六)月
What makes science really fun is when you get to do things yourself, so today were going to be making moon craters. 科学真正变得有趣的时刻就是当你亲自实践的时候，那么今天，让我们来一起制作月球陨石坑吧！ They
初学者听力文摘精选
How big an asteroid would it take to distribute this much Iridium around the entire planet? 到底要多大的小行星才能将这么多铱散布在整个星球上？ And they come up with a very rough number of something on the order of ten kilomet
侏罗纪搏击俱乐部
Create Your Own Moon Craters! What makes science really fun is when you get to do things yourself, so today were going to be making moon craters. Theyre the roundish blast-marks left on the moons surface by ancient meteorites. The moons surface is co
英语听力文摘 English Digest
Murchison Meteorite's Chemical Bonanza The 1969 Murchison meteorite was known to harbor complex organic compounds, but a new analysis in Proceedings of the National Academy of Sciences finds that it may also contain millions of chemicals and shed lig
60秒科学
The United States space agency says its Mars exploration vehicle has discovered chemical substances necessary for life. Scientists reported that NASAs Curiosity rover found large amounts of organic molecules in 3.5 billion-year-old rock in an area ca
2018年VOA慢速英语(六)月
1. Jill Carrol says she feels like she is alive again. The 28-year-old journalist arrived at Boston's Logan International Airport earlier today. Carrol was released Thursday after being held hostage f
美联社新闻一分钟2006
Crater 火山口 A crater is a big hole in the ground. 火山口就是地面上的大洞。 Volcanic activity can make craters. 火山活动会形成火山口。 After a volcano erupts, we see a huge hole on the top of the volcano. 火山喷发后，火
与美国小学生一起学英文第7册
Comparing the effects of an airburst with a ground strike, it seems the Chelyabinsk got away lightly. Its estimated that the largest piece to hit the ground weighed 500 kilos, a fraction of the asteroids original mass of 7,000 tonnes. Now if a piece
探索与发现2014年
On June 30th, 1908, a huge explosion tore through the forest of Tunguska, Siberia. It was 20 years before the Russians mounted an expedition to the site. What they found astonished them. 60 million trees across an area the size of London had been lev
探索与发现2014年
Really, its a balance between the size of the object, its speed into the atmosphere and critically the altitude at which it explodes. Too high, if its too small and it explodes too high, the shockwave has little effect on the ground. If its quite low
探索与发现2014年
Down on the ground, the scale of impact is even more breathtaking.The crater is more than 1000 meters across and nearly 200 meters deep.The forces here were enoumous.The impact on this solid rock into this pulverized mochi,just bustled in your hand.Y
探索与发现2014年
As the divers have explored further, they discovered the Siluteis are actually part of a huge complex of tounels and caves.In fact, when you look from above, you can see Senluties scattered across hundreds of kilometers.And when they were mapped, it
探索与发现2014年
The meteorite was 15 kilometres across, enough to cause utter devastation across the whole planet. It exploded with a force of 100 million million tones of TNT. The blast sent a giant plume of vaporized rock out into space. A crater was punched 30 ki
探索与发现2014年
What would you do in your last 60 minutes?An asteroid is on a collision course with the earth and you have one hour left to live. What would you do in your last 60 minutes? Not surprisingly, the majority of Britons questioned in a survey -- 54 percen
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By Yi Suli Murfreesboro, Arkansas 13 February 2007 watch Crater of Diamond report Each year thousands of visitors go to a small town in rural Arkansas in search of diamonds. The Crater Diamonds Park claims that it is the world's only diamond site wh
2007年VOA标准英语（二月）
A huge meteorite crashed into the Atlantic Ocean. Babies who were sound asleep in Asia heard the impact. The meteorite went through the ocean bottom. It created a hole deep in the Earth. All the seawater from the Atlantic started rushing into the hol
英文短篇故事（纽约）
Life emerged so swiftly, in fact, that some authorities think it must have had helpperhaps a good deal of help. 实际上，生命出现得太快，有的权威人士认为肯定有什么东西帮了忙也许是帮了大忙。 The idea that earthly l
万物简史
MOSCOW, Feb. 17 (Xinhua) -- Most buildings damaged by Friday's meteorite fall in Russia's central Urals Region have been restored, and educational institutions will operate as usual on Monday. Xinhua reporters saw in the hardest-struck Chelyabinsk Re
英语新闻