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 assume that other fast food purveyor s such as Burger King , Kentucky Fried Chicken , and others have di

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 have found fossilized remains of dragonflies with wingspans several feet in diameter. Other insects wer

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 predators. When a fish in a school is injured, for example, the rest of the school will panic and swim

英语听力文摘 English Digest 592、石英计时！

Keeping Time With Quartz Most people know that wrist watches commonly contain quartz. In fact, if you wear a watch, chances are its a quartz watch, since most watches is made today use quartz. But, you may not know what quartz has to do with keeping

英语听力文摘 English Digest 590、植物的夜生活！

The Nightlife Of Plants Most plants grow buds, flower, or lie dormant at specific times of year. What Triggers These Seasonal Changes? Temperature and rainfall often play a role, but the most important factor to many plants is the length of the day.

英语听力文摘 English Digest 589、挡风玻璃为何如此牢实？

What Makes Windshield Glass So Tough? We tend to think of glass as fragilebut in fact, glass is pretty strong stuff. A flawless fiber of glass pulled lengthwise is five times stronger than steel! Although glass is quite strong, its also very brittlea

英语听力文摘 English Digest 588、真实的熊的生活是怎样的？

The Bare Necessities Of Bears In the movie The Jungle Book, Balloo the bear spends his days singing and dancing and munching paw-paws. Actually, this is a pretty accurate picture of real bears, except for the singing and dancing. North American bears

英语听力文摘 English Digest 587、气泵上的辛烷值是什么意思？

What Do Octane Numbers Mean? At the gas pump, you have a choice of octane numbers. 87? 93? Whats the difference? To explain octane numbers, lets take an imaginative leap into the internal combustion engine of a car. Inside the cylinders are combustio

英语听力文摘 English Digest 586、想要释放压力吗，养狗吧！

For A Stress Free Life, Get A Dog! As most dog owners will attest, having a dog is great for several reasons. For one, dogs are typically loyal, steady companions. Many studies have shown that caring for a dog is a great way to get more exercise, rel

英语听力文摘 English Digest 593、神经细胞丧失会怎么样？

What Happens When You Lose Neurons? When you were born, almost all of the one trillion neurons, or nerve cells, in your brain had already formed. But those neurons still had a lot of growing to do. As kids grow, neurons in the brain branch out and ma

英语听力文摘 English Digest 549、中枢痛成因你知多少？

What Is The GABA Chemical? What would it be like if wearing a soft cotton t-shirt felt like your skin was being scrubbed with a Brillo pad? For people who suffer from a condition called central pain, such pain is all too familiar. Central Pain on thi

英语听力文摘 English Digest 556、超市的数字把戏！！

The Supermarket Numbers Game Have you ever gone to the store just for milk, but walked out with eight sale-priced cans of something youd never tasted and eight candy bars? How does that happen? Brian Wansink and colleagues have studied how people mak

英语听力文摘 English Digest 555、医生不洗手？！

The Surprising Truth: Doctors Are Not Washing Their Hands Since the beginning of time, or at least for a good long while, mothers have exhorted their kids to wash their hands. Its a lesson most of us learn and carry with us into adulthood. And youd t

英语听力文摘 English Digest 554、岩石怎么会出现在你的花园？

How Rocks Appear In Your Garden I wonder how many of us went out this past spring to get our gardens ready for planting, smug in the thought that last year we got rid of all the rocks. Theres that nice big mound of them in the corner of the garden wh

英语听力文摘 English Digest 553、利刃特别在何处？

Whats So Special About A Sharp Knife? Everyone knows that a sharp knife cuts better than a dull one, but do you know why, exactly? The purpose of the cutting edge of a knife is to concentrate the force thats being applied at the handle. When you push

英语听力文摘 English Digest 552、暴力电玩会改变我们的大脑吗？

Do Violent Video Games Change Our Brains? Video games are a huge industry kids and young adults spend more time playing them than watching movies or TV. And some of the most popular video games are ultra realistic war and fighting games featuring mas

英语听力文摘 English Digest 551、你的瞳孔出卖了你！

What Do Pupils Tell Us? The size of our pupils can give clues to our interest, emotions, attitudes, and thought processes. If youve seen a magician tell which card someone picked from a deck, youve probably been amazed. Well, the pupils often open up

英语听力文摘 English Digest 548、远古贝壳知晓过去？

Scientists Use Ancient Shells To Learn About The Past If you were traveling from the United States to Singapore, a guide book could tell you what sort of climate to expect. But if, like paleontologists and geologists, you needed to know what the weat

英语听力文摘 English Digest 547、气球不见之后发生了什么？

High Inflation Fairs, carnivals, festivals or anywhere you can buy helium-filled balloons, youre sure to see at least one balloon rising into the sky after someone accidentally lets it go off. What happens to the balloon after it rises out of sight?

英语听力文摘 English Digest 546、运动会引发头痛吗？

Does Exercise Trigger Headache? Dear A Moment of Science, I like to exercise, but I suffer from migraines and worry that getting my sweat on at the gym could trigger a headache. Am I right to be cautious? Good question. For some people, exercise can