英语听力文摘 English Digest 359、隐形眼镜的秘密

Making Contact 为什么戴隐形眼镜看东西更清楚？ Don:I get contact lenses to replace my glasses and its like Im seeing the world through new eyes. Its miraculous ! Yal: Acutlly, Don, there is nothing miraculous about it. D: Who tell? Y: W

英语听力文摘 English Digest 358、带紫外线的鱼儿

Ultraviolet Fish 带紫外线的鱼儿 So you want to attract a mate . After all, passing on your gene s is what evolution is all about. To do that you need offspring , and to get a lot of those you need to be attractive. The flash ier the better. He

英语听力文摘 English Digest 357、吸毒成瘾的科学解释

Adolescent Addictions 青少年吸毒问题 What makes adolescents so vulnerable to developing addictions to substances like nicotine, alcohol, and drugs? Teens, in particular, seem more vulnerable than any other age group. Is it a result of peer pre

英语听力文摘 English Digest 355、狗为何会汪汪叫？

Why Dogs Bark ? 犬吠为何？ Have you ever wondered why do dogs bark ? In terms of evolution , there has to be a reason for bark ing , or it probably wouldnt be there. Is it to warn of predator s ? But dogs bark when there are no predator s around

英语听力文摘 English Digest 354、致命的脱水

Dehydration 脱水 If I were to stop drinking water right now, how long could I live? There are different factors involve d here. A human being isnt an automobile which needs a certain amount of gas. There are conditions under which a person could di

英语听力文摘 English Digest 353、骨质疏松症

Osteoporosis 骨质疏松症 Todays word is: osteoporosis ! Yep, osteoporosis . Now, youve heard this word before, and you know it has something to do with bones. But can you actually explain what it is? The answer is straight-forward. It comes down

英语听力文摘 English Digest 352、尴尬的鼾声

Snoring and Cognition 鼾声和认知能力 Snoring can be pretty disturbing to people who sleep in the company of snore rs , as well as to the snore r himself or herself, though she may not realize it. For instance, some snore rs have a condition ca

英语听力文摘 English Digest 356、基因也疯狂

DNA Wrath of Khan 成吉思汗疯狂的基因 Today, Afghanistan is a war-torn region, battled over by military forces and world-spanning empire s . Eight hundred years ago things were much the same. Only then, there was only one ruler: Genghis Khan.

英语听力文摘 English Digest 340、狗最懂人的缘由

Here! Boy 乖乖，看这！ Point at a ball and a dog will look at the ball, whereas a cat will probably look at your hand. Dogs seem to have a ready understanding of how human beings direct attention by pointing, and can follow our gestures almost

英语听力文摘 English Digest 346、漫步的细胞

How Cells Get Around 漫步的细胞 A major reason why many cancers are so dangerous is that they metastasize . This means that instead of staying in one place, the cancer cells migrate from their original site to other parts of the body. No wonder

英语听力文摘 English Digest 345、你家有“鼻涕虫”吗？

Runny Nose 流鼻涕 As anyone whos had a toddler knows, theyre incredibly demanding creatures. Armed with an insatiable desire to eat and/or destroy just about everything in their path, these walking embodiment s of unchecked ego can be a handful. E

英语听力文摘 English Digest 344、另类“女尊社会”

Males Rule in Costa Rican Wasp Species 哥斯达黎加父系制度的黄蜂 In most species of social insects, such as wasp s , bees, and ants, the females rule. The females are the workers. They are the ones to go out and get the food, and they are

英语听力文摘 English Digest 343、人人都会读心术？

Mind Reading 读心术 Sometimes we get letters here asking whether psychic s are for real. Well, despite the t.v. shows, there isnt any scientific evidence that psychic powers, such as mind-reading, actually exist. That doesnt prove they dont existj

英语听力文摘 English Digest 342、无辜的嘴唇

Why lips go dry？ 为什么嘴唇会干呢？ Lets start by reviewing the ways in which the surface of our lips is different from the surface of the skin on the rest of our bodies. Basically, our lips are made of the same mucus membrane that coats t

英语听力文摘 English Digest 341、胶带能治病？

Duct Tape and Wart s 管状胶带和疣 Have you ever used duct tape to tape a duct ? Do you even know what a duct is? Maybe not. But you definitely know what duct tape is, and youve probably used it to fix everything from glasses to flashlights. Now

英语听力文摘 English Digest 339、是什么触动笑神经？

Get It? 明白了吗？ Did you ever wonder what occurs inside your body when something funny happens? What is this thing we have in our brains that makes us say ha-ha when someone slips on a banana? One way to find out is to watch the brain laugh. T

英语听力文摘 English Digest 338、老年痴呆的预防

The Prefrontal Cortex with Age 年老的 前额皮质 The prefrontal cortex is the region of the brain located just behind the forehead, where higher-level cognition occurs, such as recalling whether a word was heard aloud or read. Most people show e

英语听力文摘 English Digest 337、狗比猫更懦弱？

Is Your Dog Wimpier than Your Cat? 狗比猫更懦弱？ Have you ever noticed that while its pretty easy to tell your dog is sick, its much harder to know how your cat or bird are feeling? Well, before you start asking your dog why it cant be more s

英语听力文摘 English Digest 336、聪明的蚂蚁

Los Ant-geles 洛杉矶人和蚂蚁 If youve ever driven in LA, you know that people dont cooperate terribly well. Traffic jam s , folks cutting folks off, people shouting at you out their windows . . . its a real headache. Wed all do a lot betterat

英语听力文摘 English Digest 335、新陈代谢到底是什么？

The Parts of Metabolism 新陈代谢到底是什么？ What is metabolism really? Statements like he can eat a lot because he has a fast metabolism are somewhat misleading. Metabolism isnt about the digestion of food in your stomach; its the name giv