单词：high-frequency protective device
单词：high-frequency protective device 相关文章
As the balloons rise higer still,they face an attact by an invisible bombardment,radiation.Every day the Sun radiates a titanic amount of energy,some of them in the form of high energy of ultra violet rays.These rays packed a powerful punch ,and in t
探索与发现2014年
Back at the explosives lab, examiners use a high-tech instrument called a Raman spectrometer, a device that determines if a package contains explosive material. With the Raman, what we are doing is th
揭秘联邦调查局
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
Economics Report - A Closer Look at High-Frequency Trading 经济报道 - 近距离审视股票市场高频交易 This is the VOA Special English Economics Report. 这里是美国之音慢速英语经济报道。 Once, stocks were traded through the
2011年VOA慢速英语(十)月
Electronics Show Displays Newest Gadgets CES国际消费电子展展示新奇玩意儿 Thousands of people were in the American state of Nevada earlier this month for the Consumer Electronics Show. The CES is the worlds biggest show for electronic de
2016年VOA慢速英语(一)月
This is Scientific Americans 60 Second Science, I am Sophie Bushwick, got a minute. Kindles, Nooks and other e-readers catch flack for threatening the future of printed books. But reading itself may get a boost from the devices. For example, a study
Scientific American(三)月
EXPLORATIONS -April 3, 2002: Spacesuit History By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we tell a
Explorations
AS IT IS 2014-04-19 High Tech Aids Search and Rescue高科技搜救工具 From VOA Learning English, this is As It Is Saturday. Im Anna Matteo. Improvements in technology can save lives. Stronger buildings do not fall during storms and earthquakes. W
2014年VOA慢速英语(四)月
High Frequency Traders Under Scrutiny 美司法部调查高频交易 The U. S. Justice Department is investigating the relationship between high frequency trading firms and major exchanges -- and regulators in Washington and the state of New York are
VOA标准英语2014年(四月)
EDUCATION REPORT - High School Cyber Cafes By Jerilyn Watson Broadcast: Thursday, January 08, 2004 This is Bob Doughty with the VOA Special English Education Report. Cyber Café computer centers are f
教育与新闻
It was three o'clock. She was learning how to roller-skate. She had always wanted to learn. She could not afford to buy roller-skates before. Now, she was older. She had a job. She bought her first pair of roller-skates yesterday. It is never too lat
英语第3级听力-English Level 3
As more and more of us begin to use health savings accounts, there is a new website that’s coming online which will let you check to see how much a medical procedure truly costs. HealthGrades Incorp
商业报道2006年
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
Giving Mary Poppinss magic umbrella some serious competition is the all new high-tech Oombrella not only can it predict the weather, its also impossible to lose. The smart umbrella syncs with a smartphone app, sending users updates about weather cond
阅读空间
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)
'Haptics' is a brand new sensory technology that's set to make today's electronics even more lifelike and thrilling. From white-knuckle video games to pregnancy simulators and even techno music - haptics could make all of these things even more reali
世界各地新闻集锦
The Apple computer company introduced a new version of its popular iPad Wednesday, with a sharper screen (featuring the retina display), an improved (5 MP) camera, and the ability to use Verizon's 4G LTE wireless service, a faster method to access th
英语新闻
When Feeding Birds, Think Safety and Health Feeding birds is a popular way to watch wildlife during the winter months. But many bird experts say the experience is often more pleasant for people than for birds. And it might even put wild birds at risk
2019年VOA慢速英语(二)月
Orewa High School in Auckland expects all year 9 students next year to have their own iPad, netbook or other mobile device like a Smart phone. The school says the most suitable is the iPad which costs between $800 and $1,000. The reason that the scho
新西兰英语
Phil:So it's natural for Claire to wonder about you and her dad. This family is very protective of each other. I remember the first time Claire brought me home. Do you think Jay thought I was good enough for his little girl? No way. But, over time,
跟着美剧练发音