标签：evolutionary 相关文章
[00:00.00]The development of the country, [00:02.83]as we know it today, [00:04.47]was an evolutionary process [00:05.89]over more than eight decades. [00:08.63]Manitoba became a province [00:11.69]after some controversial events [00:13.88]involving
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Science and technology: Evolution: Bee kind to viruses 科学技术：进化：蜜蜂爱病毒 A strange tale of collaboration between plants, pathogens and insects. 植物、病毒和昆虫的奇特合作。 Cucumber mosaic virus is not restricted t
经济学人科技系列
I can see the muscles that make up my face, my skull, and my own brain. So, now I can take you on that journey into my ear in a way that’s never been possible before. This time we can fly straight t
生命物语
Student Michelle Gardner-Quinn wrote of her belief in reverence for life just before she was killed. Welcome to This I Believe, an NPR series presenting the personal philosophies of remarkable men and women from all walks of life. From NPR News, thi
2007年NPR美国国家公共电台
This is Scientific Amercian's 60 seconds sicence. I'm Ellie Wilkinson. Got a minute? If the side of Swiss cheese makes you melt, or the thought of a honeycomb gets you buzzing. You may suffer from a tripophobia, the most common phobia that you've pro
2014年Scientific American(二)月
The survival strategies of some species can seem counter-intuitive to us until we examine them in detail. Let's take the example of bees, which die after stinging once, because the stinger tears out their insides. How can this self-destructive trait
英语时差8，16
Well be kindwe wont use any sound effects on todays program. Instead, imagine your eighth-grade classroom, and your childhood nemesis creeping quietly to the chalkboard. He shapes his hand like a claw, grins evilly, and slowly, torturously, drags his
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AA: I'm Avi Arditti with Rosanne Skirble, and this week on WORDMASTER: we answer some questions from listeners. RS: Asad in Bangladesh and Emmanuel in Ghana ask somewhat related questions. Asad would like advice about a dictionary or a Web site to co
词汇大师(Wordmaster)
When mom tells these babies it's a scary world out there, so be careful, she's saying a mouthful. Cichlid fish here in Africa's Lake Tanganyika have a big problem with predators. Other fish will do whatever it takes to get cichlid babies and gobbl
国家地理2007年
一位写出了划时代的关于精神指导的书的作者，被许多人追着要求给自己一点人生的建议，而他只想自己一个人静静呆上一段时间。 对话文本:(系普特网友整理，文本只包括旁白影评部分，不包括电影原声。) Twenty years ago, an unknown writer spoke to God and heard the a
影视英语听力
Making Music for Monkey Minds A study in the journal Biology Letters finds that music based on monkey's own calls has similar effects on them that human music has on us. Cynthia Graber reports Music is known to make us happy, or calm, or sad. But do
60秒科学
The evolutionary development of the neck allowed more freely moving forelimbs, which allowed further evolution of the head and hands Whats in a neck? Well, its a good place to hang a pendant or a tie. Or to rest your head. Now scientists say that by
60秒科学
The National Safety Council estimates that 28 percent of all highway accidents and deaths are caused by drivers paying poor attention to the road because theyre holding cell phones to their heads. But a study of 200 volunteers finds that one out of e
60秒科学
AS IT IS - Earth Day 地球日 This is AS IT IS. Hi, Im Caty Weaver. Today is Earth Day. Millions of people around the world will pick up trash, learn about recycling, plant trees or take some other action to observe the day. On AS IT IS we take a lo
2013年VOA慢速英语(四)月
AA: I'm Avi Arditti with Rosanne Skirble, and this week on WORDMASTER: we answer some questions from listeners. RS: Asad in Bangladesh and Emmanuel in Ghana ask somewhat related questions. Asad would like advice about a dictionary or a Web site to co
英语单词大师-Word Master
Neandertal Face Shape Was All Over the Air The jutting midface of Neandertals seems to have evolved to help get large volumes of air into an active body that needed lots of oxygen. Full Transcript Neandertal walks into a bar. Bartender says, Why the
2018年科学美国人4月
This is the VOA Special English Health Report. A new study suggests that early exposure to germs strengthens the immune system. That means letting children get a little dirty might be good for their health later in life. The study involved laboratory
英语语言学习
February 16, 2005 AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster: words that express emotion. RS: Suppose someone gave you two minutes to write down as many different emotions as you could think of -- for example: happy, sad, a
词汇大师(Wordmaster)
台湾籍旅美老师今天交给我们的句子是： It'd be thousands of years before we linked germs to disease, but avoiding filth has deep evolutionary roots. 过了几千年后，我们才发现是细菌导致了死亡，不过远离污秽的这
留美老师带你每日说英文
Sometimes its easy to understand how an evolutionary change took place, but its more difficult to understand why. For example, consider the beautiful birds of paradise which live in the forests of New Guinea. The males of many bird-of-paradise specie
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