英语听力文摘 English Digest 520、火山与水

Volcanos and Water Firefighters use water to battle a towering inferno.You might wonder if water could also stifle an erupting volcano. Actually, this experiment happens every time a volcano erupts at the bottom of the ocean. What happens when a volc

英语听力文摘 English Digest 519、种族刻板印象

Racial Stereotypes and Memory Although there has been much debate about whether race has a biological or social basis, the bottom line is that race is a psychological reality for many people. That is, many folks assign other individuals to racial cat

英语听力文摘 English Digest 518、地球同步卫星（二）

A Stationary Satellite, part 2 A geostationary satellite orbitsthe planet at the same rate as the planet rotates, so the satellite is always over the same patch of ground. Cool! you say. Id like to have one of those about twenty feet over my house. S

英语听力文摘 English Digest 515、失去知觉之后

Out for the Count 失去知觉之后 If youve ever had major surgery, you probably remember lying down and waking upbut nothing in between. Thanks to the anesthesiologist, during the actual surgery you were out of it: immobilized and insensitive to p

英语听力文摘 English Digest 514、鱼的招亲广告

Fish ad 鱼的招亲广告 Today we're looking at fish single's ads, let's see--- single fish female seeks good father to help with eggs. Come on, don't be serious. Fish don't place ad in a paper, plus I thought a common assumption in biology is that

英语听力文摘 English Digest 513、科幻小说之父

Science Hero: Jules Verne 科学英雄：儒勒 凡尔纳 儒勒?凡尔纳（Jules Verne，1828年2月8日－1905年3月24日），法国小说家、博物学家，现代科幻小说的重要开创者之一。他一生写了六十多部大大小小的科

英语听力文摘 English Digest 512、走路的奥妙

Walking and Sloshing Youre at a party. Somebody hands you a glass. Hey, come on over here! Somebody else shouts. You take a step and the next thing you know you are wearing that tasty beverage. But why? When we walk, we keep our torsos straight, dont

英语听力文摘 English Digest 516、对扶手说再见

Farewell to Arms 对扶手说再见 Good afternoon, this is your captain speaking. We are at cruising altitude and will be in flight for another three hours, so youd better get comfortable. That means figuring out who gets the arm rest you, or your n

英语听力文摘 English Digest 564、熏肉能治流鼻血吗？

Does Bacon Stop Nosebleeds? Time to go the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Ive heard that pork can be used to stop a nosebleed. Is this true, or just a myth? Well, there are lots of anecdotal stories about do

英语听力文摘 English Digest 566、小虫防冻秘招！

Bug Antifreeze Ever seen a cricket wearing a parka? Probably not, but you might have wondered how insects make it through the winter! After all, theyre cold-blooded, so their body temperature is pretty close to the temperature around them! Why dont b

英语听力文摘 English Digest 567、睁一只眼睡觉！！

Sleeping With One Eye Open Theres an old saying that if you think youre in danger, you might ought to sleep with one eye open. Well it turns out that many kinds of birds do just that. A group of scientists at Indiana State University studied mallard

英语听力文摘 English Digest 568、你能预知未来吗？

Can You Predict The Future? Its impossible to know the future. We can guess, but no one has actual knowledge of whats going to happen down the road. But if youre someone who trusts her feelings, youre more likely to accurately predict future events t

英语听力文摘 English Digest 569、为何有些狗身上有斑点？

Why Does Spot Have Spots? In dogs with multicolored coats, white areas have no pigment cells. Black, brown or yellow areas, on the other hand, get their color from special pigment cells. When a dog is just an embryo, these pigment cells travel from t

英语听力文摘 English Digest 570、青少年怎样才能更健康幸福？

What Is The Equation For A Happy, Healthy Teen? Teenagers are often a difficult bunch. With all those hormones flooding their bodies, they can be moody, unpredictable, and prone to making dubious choices. But however turbulent their teenage years, ki

英语听力文摘 English Digest 565、什么是儿童早衰症？

What Is Progeria? Progeria was first described in the nineteenth century. The mysterious disease is often thought of as premature aging. Children with progeria are normal for their first year of life, but then develop medical problems normally seen i

英语听力文摘 English Digest 563、植物的自我防御！

Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,

英语听力文摘 English Digest 562、寒冷的晒伤！

A Cool Sunburn A listener from Ontario, California wrote to A Moment of Science with a question her sons had asked her. The boys wondered why is it that when you get sunburned you often feel chilled. It really does seem like a contradiction: youve be

英语听力文摘 English Digest 561、喋喋不休的黑猩猩！

Chattering Chimps We talk to our house pets all the time, but wouldnt it be great if your cat could answer you in English? Well, maybe it wouldnt be so great! We tend to assume that, because they dont speak human language, other animals are dumb, or

英语听力文摘 English Digest 560、为何星星会闪烁？

Why Do Stars Twinkle? If youve ever glanced skyward on a clear evening, youve probably noticed with some wonderment the sheer numbers of stars. Some are tiny, barely visible points. Others radiate strong white light. And from our earthly vantage poin

英语听力文摘 English Digest 558、为怎样防止面包变质？

How To Keep Bread From Going Stale Generally speaking, refrigeration helps to keep food fresh. Fruits, vegetables, and dairy products all last longer if kept cool. But dont try to store a loaf of bread in the refrigerator if you want it to stay fresh