TED演讲：用"云"建立一所学校(11)

It's been tried all over the world, and teachers sort of stand back and say, It just happens by itself? 在世界各地尝试过，老师们后退着说：它就这么自己发生了？ And I said, Yeah, it happens by itself.How did you know that? 我说

科学美国人60秒 SSS 2014-09-22

Sixty-six million years ago, the meteorite, a rock over six miles wide, slammed into the earth and you know what happened next, the dinos disappeared. but Benjemin Blunder, a planty ecologist at the University of Arizona, says , consider the picture

【英语时差8,16】立体视觉效果奇佳、但剧情平平的「怪兽大战外星人」

The super-duper 3-D big-screen Imaxed-out extravaganza that is Monsters vs. Aliens has bells and whistles, whiz and bang, sound and fury. It even has Reese Witherspoon. What it doesn't have is heart. . .or much of a story. Witherspoon voices a charac

英文书摘精选 Create Your Own Moon Craters制造属于你自己的月球陨石坑

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

英语听力文摘 English Digest 615、制造属于你自己的月球陨石坑

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

60秒科学:Murchison Meteorite's Chemical Bonanza

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

VOA常速英语2018--巴西国家博物馆突现大火 珍贵历史文物一去不复返

Firefighters battled throughout the night to extinguish the fire that began after the museum closed to the public on Sunday night. The 200-year-old institution which is part of Rio de Janeiros Federal University contained 20 million items including s

VOA标准英语2014--Chinese Lunar Landing Prompts Debate About Moon Exploitation 中国登月引发月球开发争论

Chinese Lunar Landing Prompts Debate About Moon Exploitation 中国登月引发月球开发争论 LONDON Last month, China successfully landed an unmanned probe on the Moon. The mission renewed a debate about the potential exploitation of the Moons r

万花筒 2013-02-18&02-20 俄罗斯遭遇陨石雨 民众恐慌

A meteorite bursting through the atmosphere over Russia injuring hundreds of folks on the ground. It happened overnight in the fringe of Siberia, sending shock to residents into a state of panic. ABC's Current Rania filed this report just moments ago

英语听力：自然百科 地球力场 Earth's Force Field—6

It's clear from the fact that the Martian crust is strongly magnetized, that there must have been a magnetic field on Mars in the past, that the only way we know to magnetize rocks is for them to form in the presence of magnetic field. Why did Mars l

2015-06-17 BBC:星光七纪元-43

These are just the whole host of compounds we make. We found many of these compounds are very interesting because they play roles in life on earth. So, its clear we were making many the building blocks of life by these very processes that happened in

VOA常速英语2013--科学家们着手应对真实撞击地球小行星

Scientists Debate, Prepare for Killer Asteroid 科学家们着手应对真实撞击地球小行星 NEW YORK Earthquakes, Tsunamis, Volcanoes. Now, add asteroids to the list of natural disasters that can threaten humanity and all life on our planet. F

英语听力：自然百科 行星旅行指南：火星 Mars—18

There is no room to screw up on a trip like this, mental or otherwise. Once on Mars, you are likely to be stuck there for a year or more, waiting for a window of opportunity to ride home. And unlike a robot, the hopes and fears of the whole planet wi

英语听力：自然百科 行星旅行指南：火星 Mars—10

But still be able to use your hands. Not only will you want to move your fingers, you want to move around. NASAs lunar electric rover is a prototype for future missions to the moon and Mars. Its part vehicle and part space suit. I can just picture be