单词：high silicon surface layer
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Wednesday's air quality index in Atlanta, Georgia, miles away from any of the fires, was unhealthy. In Chattanooga, Tennessee, it was 151. What exactly does that mean? SUBTITLE: What is the AQI? JENNIFER GRAY, CNN METEOROLOGIST: The one thing you nee
CNN美国有线新闻2017年1月
It's a common enough sound in summer, after the wind finally picks up on a hot and humid afternoon, as the rain starts spattering down in big, fat drops--you're in for a full-blown thunderstorm. It's much less common in winter, even during a snow sto
英语时差8，16
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
as it is 事实上，实际上 be running out of 用尽，用完 beneath 在之下 capsule 容器 cause ...to 导致 （使处于的结果 ） collapse 坍塌 drill 钻孔 explosive 炸药 keep in touch with 与保持联系 layer 层 lose heart 失望，
新概念英语第二册单词MP3
Ditto is one of the latest high-tech companies to set up shop in San Francisco, California. The company has designed an interactive platform using high tech facial recognition software where you can check your appearance when trying out spectacle fra
英闻天下
Healing Elbows And Eyeballs A scratch to the surface of your eye heals quite rapidly, often in a matter of minutes. But a surface scratch on your elbow takes days rather than minutes to heal. The reason for these different rates of healing is directl
英语时差8，16
You could use the balloons not just to go to the edge of the space as we do now,but go all the way over the line, and actually to use balloons or airships to go all the way into space,space travel without rocket.Officially, the atmosphere ends and sp
探索与发现2014年
To be living at the start of the new millenium is to exist in the most advanced technological era in history. It is easy2 to forget that we are still surrounded by countless opportunities to get close to the earth, the sea and all the otherwonders of
202 Useful Exercises for IELTS
Mantle 地幔 We are living on the surface of the Earth. 我们生活在地球表面。 So, what is inside the Earth? 那么，地球内部是什么？ There is a mantle under the surface of the Earth. 地球表面以下是地幔。 The mantle takes
与美国小学生一起学英文第7册
You might think the only place to set up a technology company in the United States is California. After all, Northern California has Silicon Valley, which is home to companies like Apple and Google. One expert on new business agrees Silicon Valley is
2016年VOA慢速英语(十二)月
Russian President Dmitry Medvedev uses a touch screen during a video-link at the Gorki presidential residence outside Moscow, 07 Jun 2010 US Defense Department Backs Quick Ratification of New START Treaty with Russia Russian President Dmitri Medvedev
VOA标准英语2010年(六)月
Science Fiction-style replications, as seen in TV shows like Star Trek, might be a step nearer to becoming reality. Digital technology means it's now possible to make 3D objects from downloaded designs. Our reporter Li Dong has the details. These fun
世界各地新闻集锦
Microneedles 微针疗法 Female: From flu vaccin es to tetanus booster s , injections are a must in modern medicine. But do they always have to make you say Ouch? Male: Eh,no? F: No,indeed.If new microneedle technology is successful, we may soon hav
英语听力文摘 English Digest
It is hard to escape the images of Konza City in Kenya. Advertisements promoting the future high-tech hub, or technopolis, appear daily in the country's newspapers and show regularly on the state television network. The ambitious plan is the work of
英语新闻
U.S. National Research Council calls for more exploration Rosanne Skirble | Washington, DC 08 April 2010 Photo: Smithsonian National Museum of Natural History Rick Potts has led excavations at early human sites in the East African Rift Valley, and cu
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很多参加gre的考生在做gre写作的时候都没有写提纲的习惯，这是非常不好的。提纲在gre写作当中起到了至关重要的作用。从今天起，我们将对gre issue进行分析，弄清写作思路，这样才能让gre
GRE作文
托福阅读的关键是在于多看多练，为了帮助广大考生更好的复习，小编为大家整理提供托福阅读背景知识，以供各位考生复习参考，生活中有很多事情需要大家细心观察和发现，阅读文章不仅
托福英语
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
It's a common enough sound in summer, after the wind finally picks up on a hot and humid afternoon, as the rain starts spattering down in big, fat drops--you're in for a full-blown thunderstorm. It's much less common in winter, even during a snow sto
英语听力文摘 English Digest