单词：impact crater
impact crater的用法和样例：
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。
- UNDAUNTED BY SKEPTICISM, a handful of scientists continues to look for potential impact craters and tracers.有一群科学家没有因为其他学者的怀疑而丧志，继续搜寻可能的撞击坑与撞击遗迹。
单词：impact crater 相关文章
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
The best scientific exploration sounded like a fairytale. 当时最好的科学理论就像是童话故事。 My second grade teacher Mrs. McGonigle read it to us. 我的二年级老师麦戈尼格尔女士告诉我们。 The dinosaurs had small brai
公众人物毕业演讲
考试日期： 2012 年 11 月 3 日 Reading Passage 1 Title: The dinosaurs footprints and extinction Question types: YES/NO/NOT GIVEN, Summary 文章内容回顾 文章从恐龙的脚印开始讲恐龙的灭绝。 英文原文阅读 Mass Extinction
雅思机经
Last October, a NASA rocket, traveling at a speed of 9,000 kilometers per hour, smashed into a dark crater on the moon's south pole. Upon impact, the Centaur rocket kicked up a cloud of debris and elements from the moon's surface, creating a so-calle
VOA标准英语2010年(十)月
Large Impacts May Cause Volcanic Eruptions巨大冲击引发火山喷发 Other rocky planets in our solar system show a common feature: within giant craters caused by impacts theres evidence of volcanic activity. Which made scientists wondercan big i
2017年Scientific American(六)月
NASA has accomplished another first. I guess my summary is really cool. Today we kicked up some moon dusts and all indications are.. its going to be a very interesting set of results. As we, uh, approach very rapidly the surface of the Cabeus crater.
自然百科2009年
An asteroid strike would create a huge explosion. NASA feared this might even be mistaken for a nuclear bomb. We wanted folks to know this was a natural event by Mother Nature rather than some sort of man-made event like a missile or something dreadf
探索与发现2014年
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
So this was serial number one. It was built during the Apollo time. I guess because they thought there would be several of them made, but this is the first one and the last one and is the only one like it in the world. This is NASAs Vertical Gun Rang
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
US Space Probe to Reveal Comet's Secrets 美国航天探测器揭示彗星状况 A U.S. spacecraft is completing afive-and-a-halfmonth voyage to a distant comet and could create celestial fireworks wh
VOA2005（下）--环境科学探索
Ever wanted to be an astronaut? Imagine it was you, who was heading to the hot zone of the two inner planets, where would you go? What would you see? And how would you survive? The latest robotic machines have revealed more about these worlds than ev
自然百科2012年
One fragment, known as Nucleus G, struck with the force of about six million megatonsseventy-five times more than all the nuclear weaponry in existence. 有个名叫核G的碎块，其撞击威力高达6亿吨级──相当于现有核武器的总威力
万物简史
Hildebrand traveled to the site and decided fairly swiftly that they had their crater. 希尔德布兰德来到该地，很快就得出结论，他们找到了想要找的大坑。 By early 1991 it had been established to nearly everyone's satisfacti
万物简史
The story begins in the early 1950s when a bright young geologist named Eugene Shoemaker paid a visit to Meteor Crater in Arizona. 故事始于20世纪50年代之初。当时，有一位名叫尤金苏梅克的年轻有为的地质学家对亚利桑那
万物简史
The trauma to Manson's geology had come not from within the Earth, but from at least 100 million miles beyond. Sometime in the very ancient past, when Manson stood on the edge of a shallow sea, a rock about a mile and a half across, weighing ten bill
万物简史