Financial experts agree that part of the economic slowdown over the last few years can be attributed partly to the demise of the so-called dot-coms. Investors threw lots of cash at these start-up internet businesses, despite having no clear idea of h

发表于:2018-12-05 / 阅读(60) / 评论(0) 分类 英语听力文摘 English Digest

The complex vocalizations of songbirds are learned, not inherited. Some even have regional accents. Wrens, thrushes and other songbirds don't hatch with their impressive musical talents. They learn to sing their extensive repertoires by listening to

发表于:2018-12-05 / 阅读(49) / 评论(0) 分类 英语听力文摘 English Digest

President Bush says the key to a strong economy is the creation of more small business. But statistics show that most startups are doomed to fail. However, the experts agree that with planning and hard work a new company can beat the odds. This morni

发表于:2018-12-05 / 阅读(58) / 评论(0) 分类 英语听力文摘 English Digest

Cloning Pets Is animal cloning for real? I want to have my cat cloned. Well, animal cloning technology exists, but pet cloning isnt quite there yet. And it may never be. Why not? I could think lots of people could want to have copies of their pets. T

发表于:2019-01-26 / 阅读(66) / 评论(0) 分类 英语听力文摘 English Digest

Ya?l: [In a baby talk cooing voice] Ready for a moment of science? D: Sure, Ya?l, but why are you talking to me like I'm a baby? Y: [Regular voice] Just making a point Don. Why did you think I was talking as if you were a baby? D: Hmmm. Because of th

发表于:2019-01-26 / 阅读(80) / 评论(0) 分类 英语听力文摘 English Digest

Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On todayss Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm

发表于:2019-01-26 / 阅读(68) / 评论(0) 分类 英语听力文摘 English Digest

Don: Who's the smartest dog in the whole wide world? DOG BARKING Yael: Please. Even if Ralph is the smartest dog in the world, that's not saying much. Any animal that will do exactly what you tell it to do isn't very smart. I'm not saying dogs weren'

发表于:2019-01-26 / 阅读(47) / 评论(0) 分类 英语听力文摘 English Digest

Hong Kong comedian Stephen Chow has been a major player in the area's film industry for almost two decades, but it wasn't until 2001's Shaolin Soccer followed by 2004's Kung Fu Hustle that Chow really rocketed to the stratosphere, where he currently

发表于:2019-01-26 / 阅读(60) / 评论(0) 分类 英语听力文摘 English Digest

The Ant and the Dove An ant went to the bank of a river to quench its thirst, and being carried away by the rush of the stream, was on the point of drowning. A dove sitting on a tree overhanging the water plucked a leaf and let it fall into the strea

发表于:2019-01-26 / 阅读(66) / 评论(0) 分类 英语听力文摘 English Digest

South Africa's police force has an image problem. Faced with one of the world's highest crime rates, its officers are seen by many as ineffective, sometimes corrupt and often lumberingly overweight. That's now all supposed to change under Bheki Cele

发表于:2019-01-26 / 阅读(59) / 评论(0) 分类 英语听力文摘 English Digest

Ant Attack! Imagine this. Youre coming home to your gated community after a long day of work. As you stop to show the guard your ID, a mugger jumps out from behind a bush and grab s you by the mouth. Okay, that last part sounded a little weird, but t

发表于:2019-02-16 / 阅读(61) / 评论(0) 分类 英语听力文摘 English Digest

Yael: Hey Don, see that guy over there? I'm always forgetting his name! Don: Oh, you mean Matt? Y: Yeah, that's it! You know, it's really easy for me to remember some names, but others take a lot of work. D: Don't feel bad. It might be because Matt's

发表于:2019-02-16 / 阅读(63) / 评论(0) 分类 英语听力文摘 English Digest

Hi there, I'm Ore with the BBC World News for Children. It's Tuesday the 1st of June. Coming up: The latest attempt to plug the American oil leak has failed. World Cup teams are picked. And a Japanese teenage girl is a baseball hit! First - the Unite

发表于:2019-02-16 / 阅读(65) / 评论(0) 分类 英语听力文摘 English Digest

Bat Spit 蝙蝠的唾液 Anyone who reads gothic fiction will tell you that vampires are bad news. People who read modern medical journal s , however, might disagreein fact, they think vampires just might help save lives. The kind of vampire Im talki

发表于:2019-02-24 / 阅读(66) / 评论(0) 分类 英语听力文摘 English Digest

Bedtime Blues 尿床的困扰 Never a happy topic, bed wetting is a very distressing problem for five to seven million American kids. If we cant explain why some people like to pick on these kids, can we at least shed some light on what causes bed we

发表于:2019-02-24 / 阅读(89) / 评论(0) 分类 英语听力文摘 English Digest

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

发表于:2019-02-24 / 阅读(83) / 评论(0) 分类 英语听力文摘 English Digest

Nutrigenomics 营养基因组学(nutrigenomics 或nutritional genomics,又叫营养遗传学 nutrigenetics)是研究营养素和植物化学物质对机体基因的转录、翻译表达及代谢机理的科学。 膳食是影响人体健康最重

发表于:2019-02-24 / 阅读(75) / 评论(0) 分类 英语听力文摘 English Digest

The Denatured Egg White 煮鸡蛋还有那么多学问哪?在煮鸡蛋过程,鸡蛋会发生哪些变化呢? 蛋白质变性(protein denaturation)是指蛋白质在某些物理和化学因素作用下其特定的空间构象被改变,从而导致

发表于:2019-02-24 / 阅读(68) / 评论(0) 分类 英语听力文摘 English Digest

Acanthostega 这种生物已经演化出前后肢,但每肢都有8趾。这种生物是从鱼类进化到两栖类的过渡产物。而且,它具有更多的鱼类特征,如有鳃、鳍和只能在水中起作用的感官。伦敦自然历史博

发表于:2019-02-24 / 阅读(72) / 评论(0) 分类 英语听力文摘 English Digest

Nice Set of Pipes 尽管管风琴对我们来说还是比较生疏的乐器,但它的发音原理与我国民间流传至今仍在使用的古老乐器芦笙十分近似。据史料记载,公元前250年前古希腊工程师克提西比奥(Ktes

发表于:2019-02-25 / 阅读(72) / 评论(0) 分类 英语听力文摘 English Digest