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1.英语听力文摘 English Digest 604、声速测量
In the 17th century, the French scientist Pierre Gassendi knew that light traveled faster than sound. When a gun fired far away, he could see the flas...
2.英语听力文摘 English Digest 603、听诊器是怎么发明出来的？
In the early 1800s, a French physician named Ren Laennec had a dilemma. He needed to listen to the heart sounds of a young woman with signs of heart d...
3.英语听力文摘 English Digest 602、抑郁可能对进化有好处
Feeling down? Youre not alone. If depression seems pretty common, it is. One in every ten adults suffers from depression. And thats what has scientist...
4.英语听力文摘 English Digest 601、树叶与太阳能板
Leaves Inspire Better Solar Panels What do leaves and solar panels have in common? Both absorb sunlight and turn it into energy. But while solar panel...
5.英语听力文摘 English Digest 600、科学家如何预测火山喷发？
its time again for the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Ive always been fascinated by volcanoes. So I was won...
6.英语听力文摘 English Digest 599、太空中进餐！
In the 1960s, during the earliest space flights, no one knew exactly how weightlessness would affect eating and drinking. Would food fly off a plate? ...
7.英语听力文摘 English Digest 598、宇航员如何在太空中上厕所？
It may sound silly, but its really a good question, because weightlessness does make a visit to the latrine a tricky proposition. Weightlessness poses...
8.英语听力文摘 English Digest 597、快餐和抑郁之间有联系吗？
According to data posted on McDonalds famous Golden Arches , the fast food giant has served billions of customers around the world . It s safe to assu...
9.英语听力文摘 English Digest 596、以前的昆虫是很庞大的！
In The Past, Insects Were Huge! Once upon a time, hundreds of millions of years ago, many insects were much larger than they are today. Scientists hav...
10.英语听力文摘 English Digest 595、恐惧闻起来像糖！
Fear Smells Like Sugar Scientists have suspected for many years that fish might give off a chemical signal to warn other fish about the presence of pr...