美国有线新闻 CNN 通过查看空气质量指数保护健康

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

英语听力：探索发现 科学新发现：我们的大气层-20

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

英语听力：探索发现 科学新发现：我们的大气层-17

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

【一起闲话英语】什么是生物化学—What is Biochemistry?

Passage Transcript biochemistry is a very specific area of chemical science which, studies the interactions of biological systems with chemical components, and which also determines, which chemical components and, how interacts with the human body an

英语课程计划-the Preservation of the Ozone Layer

There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th

202 Useful Exercises for IELTS Side1-16-Ex2.8Lecture2

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

双语有声阅读:What Is Money and What Are Its Functions? 金

What Is Money and What Are Its Functions? Money is something you've been familiar with throughout your life. In fact, you may already consider yourself an expert on the subject. You regularly use money to measure the value of things you own. You also

2007年VOA标准英语-Bears Player Overcomes Long Odds to Reach Super

By Parke Brewer Washington 30 January 2007 There are 32 teams in the National Football League and only two reach the coveted Super Bowl championship game each season. This Sunday it is the Chicago Bears and the Indianapolis Colts, playing in Miami, F

UNIT 5 Family and Home Lesson 33: Li Ming's Family

[ti:UNIT 5 Family and Home Lesson 33: Li Ming's Family] [00:01.72]UNIT 5 第五单元 [00:03.69]Lessons 33～40 第33～40课 [00:07.17]Family and Home 家庭和家 [00:10.24]Lesson 33: 第33课： [00:12.07]Li Ming's Family 李明的家庭 [00:15.05

3D Printer

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

商务口语：商务会议实战演练－1

Len Matheson is the owner of a small company thats rapidly expanding. Hes getting advice from Mary Carlyle, a business consultant, on developing a functional organizational structure to better deal with his companys expansion. Mary: Mr. Matheson, Ive

纯正英语一分钟-ozone layer

I first heard about the ozone layer about twenty years ago. I was still in school. I thought it was interesting, but I didnt take it seriously. It was a bit like science fiction, I mean, how could there be a giant hole in the atmosphere? Over the yea

英语听力：2013-08-18 《流言终结者》 第11季 第8集 完全爆炸手册—7

To be honest, we are totally in awe of people whose job is to face these in real life. But the grenade made into this A-to-Z is the Rocket Propelled Grenade, or RPG, because that is what gave us one of the best booms in Mythbusters history. Alright,

向商务顾问请教公司结构

Len Matheson is the owner of a small company thats rapidly expanding. Hes getting advice from Mary Carlyle, a business consultant, on developing a functional organizational structure to better deal with his companys expansion. （Len Matheson是一家发

China to dismantle Railway Ministry

BEIJING, March 10 (Xinhua) -- China plans to dismantle the Ministry of Railways into administrative and commercial arms to reduce bureaucracy and improve railway service efficiency, a top Chinese official said Sunday. The existing Railways Ministry,

毕业文凭公证书英文版

公证书 Certificate (90)Lu Zi, No. 1130 This is to certificate that Mr. Zhao Qiangwen holds a diploma issued to him in July, 1980 by Shandong University (Diploma No. 064)and that we have carefully checked the seal of the University and the signatur

商业书信的十点注意事项

1．切忌主客不分或模糊。例子： Deciding to rescind the earlier estimate， our report was updated to include $40，000 for new equipment． 应改为 Deciding to rescind our earlier estimate， we have updated our report to include $40，

VOA标准英语2010-Climate Changes Appear to Coincide with H

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

CCTV9英语新闻：Premier Li Keqiang attends teleconference on gov't functions

Chinese Premier Li Keqiang said the Chinese government will double efforts to streamline administration, transform functions and boost efficiency. The aim is to spur economic vitality and attract overseas investment. He made the remarks at a national

Lesson 67-1 In the Pharmacy 在药店

Listen to the dialogues people talking with the pharmacist. Then, check themes they talked about. 英语对话1 A:We have two kinds of aspirin for headache,AspiZine and Ai-Samin. B:What are the differences? A:The AspiZine is made in USA. The 'Ai-Sami