单词:data link layer
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CHAPTER ONE [00:44.25]READING [00:45.74]Page 2 and 3 [00:48.43]THE YOUNG GREEN CONSUMER GUIDE [00:51.51]Review by Tony Ma [00:54.62]This book says that our world is in danger [00:59.32]It is vital that we do something to save the earth [01:04.21]Firs
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
I think we can all agree that reality is pretty great. Its what we experience through our senses, like our eyes, and phones with cameras. The Internet is awesome too, but the internet and reality have a hard time working together. Thankfully this is
lip-----------嘴唇 lift-----------举起 link----------关系 little---------少的 limit---------限制 list-----------表 listen--------听
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
avulse, vt (由于意外事故或通过外科手术)把(身体的一部分)撕脱;抽出 【反】link(vt 连结);suture(vt 缝合)
Broadcast: Jan 30 2003 Researchers say there appears to be no link between a substance found in some high-carbohydrate foods and the development of some types of cancer. U.S. and Swedish researchers c
DHCP Dynamic Host Configuration Protocol 动态主机配置协议 DHCS Database Host and Control System 数据库主机与控制系统 DHN Digital Home Network 数字家庭网 DHTML Dynamic HyperText
By VOA News 12 January 2008 The husband of Pakistan's assassinated former prime minister and opposition leader Benazir Bhutto says he thinks recent terrorist attacks in Pakistan are part of an attempt to rig upcoming parliamentary elections. In an in
By Carol Pearson Washington 29 May 2008 The U.S. Centers for Disease Control and Prevention has recommends that adults ages 60 and older get vaccinated against shingles. The painful blisters of the disease, caused by the same virus as chickenpox,can
The government will issue real-time air quality monitoring data in 74 cities starting January 1st. The Ministry of Environmental Protection says the data will include PM2.5, a gauge which monitors fine particles with a diameter of 2.5 microns or less
A: May I exchange this DVD player? B: Certainly. Do you have your receipt? A: Here you are. B: Now, why do you want to exchange it? A: It won't play a DVD. B: I'm sorry. I'll get you a new player. A: At first, I thought it was me. B: Okay, here's a n
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
The same technology used to make prosthetic limbs is now being used to clone some of the world's earliest manuscripts from Mesopotamia, an area near modern-day Iraq. When the US invaded Iraq in 2003, thousands of artifacts were stolen from museums in
Abortion and Breast Cancer When it comes to certain hot topics, claims about what science has or hasnt proven tend to be thrown around more in the service of one position or another than anything else. Somebody may tell you that global warming is abs
HEALTH REPORT - Study Shows No Link Between Cell Phones and Rare Tumor By Cynthia Kirk Broadcast: Wednesday, September 07, 2005 I'm Barbara Klein with the VOA Special English Health Report. New resear
Brazil's National Institute of Amazonian Research and Germany's Max Planck Institute have joined efforts to build the Amazon Tall Tower Observatory (ATTO). Located along the waterways of a northern tributary of the Amazon River, the observatory was f
SAN FRANCISCO, April 22 (Xinhua) -- Apple and Google collect smartphone(智能手机) users' location information as part of their race to build massive databases, The Wall Street Journal reported on Friday after analyzing data and documents. Accordi
By Jessica Berman Washington 06 December 2007 Children who are overweight are at significant risk of developing heart disease as adults. That's the conclusion of two studies published in this week's New England Journal of Medicine , which predicts wh