单词：ultra high-frequency sound device
单词：ultra high-frequency sound device 相关文章
From VOA Learning English, this is the Health Lifestyle report. Our brains are protected by our skull. But that is not the only protection it has. A natural barrier around our brains prevents germs and other damaging substances in the blood from ente
2018年VOA慢速英语(八)月
Welcome to Words and Their Stories, from VOA Learning English. On this program we explore common expressions in American English. Like all languages, our expressions come from everywhere. They come from nature, sports, and food. They come from money,
2018年VOA慢速英语(七)月
UNIT 4 Text A PRE-READING TASK Exercise 1 Before reading the passage, look at these questions. Then try to find the answers as you read it. 1. Where is the Bermuda Triangle located? 2. What happened t
实用英语综合教程
This is Scientific Americans 60-Second Science, Im Cynthia Graber, this will just take a minute. Our ears are highly attuned to sounds in the world around us. Its not just the frequency of the sound itself. There are also subtle differences and shift
Scientific American(一)月
EXPLORATIONS - International Consumer Electronics Show Presents Latest Technology and Products from 2,500 CompaniesBy Dana Demange Broadcast: Wednesday, January 25, 2006 (MUSIC) VOICE ONE: I'm Pat Bod
2006年慢速英语（一）月
ENVIRONMENT REPORT - November 22, 2002: Compromise on U.S. Navy Sonar By Cynthia Kirk This is the VOA Special English ENVIRONMENT REPORT. The United States Navy has agreed to temporarily limit testing
健康与环境
Blue whales off the California coast make calls that, sped up 10 times, sound like (sound of two-part call). The original is a wall-rattling frequency too low for us to hear. Scientists analyzed around 2,500 of those calls, and found that the second
Scientific American(八)月
This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Thats a sound that inspires fear around the world: the dentists drill. And fear of that sound itself could play a part in keeping some people from gettin
Scientific American(一)月
ENVIRONMENT REPORT — January 18, 2002: U.S. Navy and Whales By Mario Ritter This is the VOA Special English ENVIRONMENT REPORT. In March of the year Two-Thousand, seventeen large ocean animals myste
健康与环境
Screams Have Special Place in Brain 尖叫声在大脑中会有特殊的位置 From VOA Learning English, this is the Health Lifestyle report. Have you ever thought about screaming? A blood-curdling scream is a natural reaction to sudden, extreme fri
2015年VOA慢速英语(八)月
STEVE INSKEEP, HOST: The BBC series Planet Earth was one of the first blockbuster high-definition TV shows a decade ago. Tomorrow, Planet Earth II debuts on BBC America. And this time, it is said to be in ultrahigh def. Reporter Will Huntsberry found
2017年NPR美国国家公共电台2月
Well, I was born with a rare visual condition called achromatopsia, which is total color blindness, 我出生在一个色彩极少的世界,世界只有明暗之分，这叫做全色盲 so I've never seen color, 所以我不知道什么是颜色， a
TED演讲国际问题篇
China has long depended on coal-burning power plants to fuel its explosive growth over the past three decades. As a result, air pollution has risen to alarming levels in central and eastern regions. Policymakers have been working hard to shift the co
2017CRI中国国际广播电台
THIS IS AMERICA - With Podcasts, When Students Speak in Class, the World Can ListenBy Brianna Blake Broadcast: Monday, March 20, 2006 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA in VOA Special Engli
2006年慢速英语（三）月
By Barry Wood Belgrade 03 February 2008 Serbian pro-Western President Boris Tadic has claimed victory over his ultra-nationalist challenger Tomislav Nikolic in a closely contested runoff vote. VOA's Barry Wood in Belgrade reports that amid mild and s
VOA常速英语2008年（二月）
High-Tech Device Reduces Risk of Hospital Infections This machine fires bursts of ultraviolet, or UV, light that penetrate the cells of micro-organisms and kill them. The organisms have no chance to adapt and gain immunity as they might with a chemic
VOA标准英语2012年(二月)
This year, TV makers are doing their best to give huge-screen fanatics more breathing room. New ultrahigh-definition sets were shown off Monday by LG Electronics, Sharp, Sony and Samsung Electronics at the international CES gadget show in Las Vegas.
英闻天下
Stutter ing Ear 用耳朵治口吃 Remember that kid in your grade school class who stutter ed ? Well, he was in good companya whopping three million people in the United States alone are affected by this problem. 还记得小学时班上那个说话结
英语听力文摘 English Digest
Science and technology 科学技术 Channelling heat 传递热量 Good conduct 良好的传导 It may soon be possible to control heat flows with great precision 有可能实现对热流的精确控制 HEAT, as every schoolboy knows, moves in three w
经济学人科技系列
Despite temperatures of around 30 degrees Celsius on Sunday, hundreds turned out in southwest Beijing to take part in what's known as an ultra-marathon. More than twice the distance of a marathon, which is just over 42 kilometers, ultra-marathons are
2016CRI中国国际广播电台