Sir Nicholas Winton, a British man who saved 669 children from the Nazis, was awarded the highest civilian honour in the Czech Republic on Tuesday. 尼古拉斯温顿爵士是一位英国人,他曾从纳粹手里救出669名犹太儿童。他在本周

发表于:2019-01-06 / 阅读(79) / 评论(0) 分类 英语新闻

How Does One Find a Meteorite? 如何找到陨石? Editor's Note: The annual Perseid meteor shower will peak in the skies over Earth on the night of Aug. 12-13. Despite a bright moon supermoon, there should still be a good show from this prolific sho

发表于:2019-01-12 / 阅读(58) / 评论(0) 分类 2014年VOA慢速英语(八)月

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

发表于:2019-01-23 / 阅读(52) / 评论(0) 分类 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

发表于:2019-01-23 / 阅读(55) / 评论(0) 分类 探索与发现2014年

Look at the size of this! This is magnificent! That is beautiful. This cave may be stunning, but it provides the evidence for one of the greatest catastrophes in the Earths history. And that water, its so clear! Lower the gear, please! Theres actuall

发表于:2019-01-23 / 阅读(40) / 评论(0) 分类 探索与发现2014年

Luckily, the very biggest asteroids are few and far between. But there are still plenty of rocks out there that represent a significant danger to us. So, at the summit of an extinct Hawaiian volcano, Professor Nick Kaiser and his colleagues are searc

发表于:2019-01-23 / 阅读(56) / 评论(0) 分类 探索与发现2014年

Tim has developed a map to visualize their location. And on that map, the most important are the Near-Earth asteroids, the ones closest to the planet. On the screen here is a map of the solar system. And Ive got the Sun in the centre and the third pl

发表于:2019-01-23 / 阅读(62) / 评论(0) 分类 探索与发现2014年

On 6th October 2008, asteroid hunter Richard Kowalski saw something that would change the assessment of threats presented by asteroid impacts. The night was proceeding normally and up on the screen came another asteroid. As I continued to make observ

发表于:2019-01-23 / 阅读(44) / 评论(0) 分类 探索与发现2014年

Weknew from the radar measurements where Golevka was within a few tens of metres.And yet it was actually 12 or 15 kilometres away from where it was predicted tobe without Yarkovsky effect. So these very precise radar observations allowedus to see the

发表于:2019-01-23 / 阅读(58) / 评论(0) 分类 探索与发现2014年

Heset out to investigate a hundred-year-old theory that said asteroids werepowered by the Sun itself. It was called the Yarkovsky effect. The Yarkovskyeffect is a very small acceleration and acts on asteroids and what it is is ifyou take a model, the

发表于:2019-01-23 / 阅读(57) / 评论(0) 分类 探索与发现2014年

Well,the early reports are that it is an ordinary chondrite and that means it willbe similar to this one. So this is really exciting for us as scientists becausewe want to know how the planets formed, what was around before the planets, whatthe envir

发表于:2019-01-23 / 阅读(64) / 评论(0) 分类 探索与发现2014年

Itsremarkable how we are able to build up this picture of whats going on millionsof miles away in the solar system. Its one of the joys of science really, justalmost like a detective picking up on those tiny clues to tell a bigger story. Sothat the b

发表于:2019-01-23 / 阅读(76) / 评论(0) 分类 探索与发现2014年

For the residents of the Russian city of Chelyabinsk, the morning of Friday, February 15, 2013 began like any other. As they set off to work in what has become a craze throughout Russia, many recorded their journeys, but these cameras usually used fo

发表于:2019-01-23 / 阅读(54) / 评论(0) 分类 探索与发现2014年

Amazing images. But what can you get out of these asan expert? What it shows us, first of all, is a great record ofthe entry of the object into the Earths atmosphere. So you see it right fromthe moment it really penetrated. And there it is. That is t

发表于:2019-01-23 / 阅读(45) / 评论(0) 分类 探索与发现2014年

The explosion generated a shockwave so massive it wasdetected over 15,000 kilometres away. The low-frequency waves were picked up bymonitoring stations. So it is kind of like a listening network around theworld. Thats right. Theyre not set up for fir

发表于:2019-01-23 / 阅读(45) / 评论(0) 分类 探索与发现2014年

By collecting and comparing meteorites, scientistshave been able to piece together a picture of how they form and these studieshave revealed some of the most remarkable rocks in the solar system. Few places in the world have got as many meteoritesas

发表于:2019-01-23 / 阅读(49) / 评论(0) 分类 探索与发现2014年

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 游戏说明: 躲避陨石 方向键控制躲避飞来的太空石头

发表于:2019-02-09 / 阅读(160) / 评论(0) 分类 英语操作敏捷小游戏

主餐一道:泛听练习 以下段落是摘自新闻里的一些重要信息,并不是一个段落的听写。空内信息可在本新闻中全部找到,大家可以根据这些信息复述新闻。 一、泛听建议: 1、完整听一遍,掌握

发表于:2019-02-15 / 阅读(115) / 评论(0) 分类 NPR边听边练

But what is Hitler's promise worth? 但希特勒的承诺有何价值? Just 6 months later, he invades the rest of Czechoslovakia and enters Prague accompanied by Marshal Hermann Goering. 仅仅六个月后,他入侵捷克其他地区,并在赫曼

发表于:2019-02-19 / 阅读(45) / 评论(0) 分类 二战启示录

It happened sixty-eight years ago. On 30 October 1938, strange explosions were observed on the surface of the planet Mars. There were also reports of a meteorite landing in New Jersey in the United States. But then it became clear that it was not a m

发表于:2019-03-01 / 阅读(84) / 评论(0) 分类 听播客学英语