单词:stimulated emission detector
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Unit 31 单词 1.airy 2.spacious 3.outfit 4.manly 5.fabric 6.individuality 7.reflect 8.reflective 9.underneath 10.obscene 11.abuse 12.conscious 13.biographical 14.corrupt 15.tactical 16.plateau 17.heroic 18.rotten 19.superhuman 20.labour 21.distill 2
EXPLORATIONS - The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can
She reciprocated by getting him a hobby kit for grinding a lens and making a camera. 她会帮他弄到一些小工具,让他可以做些打磨镜头、制作相机之类的事情。 I learned more from her than any other teacher, and if it hadnt b
It might be the cheeks flushing with embarrassment or a voice choking with emotion. Our physical reactions can reveal what we truly feel. And some think they can show when someone's lying. Typically when a person tells a lie, they begin to sweat. I'
This is Scientific American 60 Second Science, I am Karen Hopkin, this will just take a minute. Every year, about 10 million tons of paper winds up in American landfills and incinerators, which is not only wasteful but adds CO2 to the atmosphere. Rec
Life is filled with more instances of waiting than actually doing what we were waiting for. On a lighter and lesser philosophical note, we all have gone through the irritating period of waiting for someone who is a regular late comer. These times com
The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can go from the sci
Negotiators at the climate summit in Copenhagen last month failed to agree on a new climate change treaty to replace the current Kyoto Protocol before it expires in 2012. Jonathan Lash is president of World Resources Institute, an environmental polic
India says it is satisfied with outcome of the recent climate summit at Copenhagen, which did not spell out specific targets for reducing carbon emissions. India is hailing the united position adopted by big developing countries at the summit. Anjana
By Nancy-Amelia Collins Bali, Indonesia 13 December 2007 The head of the United Nations Climate Change Conference is warning that a deadlock between the United States and the European Union over greenhouse gas emission targets may derail the conferen
It might be the cheeks flushing with embarrassment or a voice choking with emotion. Our physical reactions can reveal what we truly feel. And some think they can show when someone's lying. Typically when a person tells a lie, they begin to sweat. I'm
So Sculley agreed to meet again when Jobs next came to New York, 因此,斯卡利同意在乔布斯下次来纽约的时候再次同他会面, which happened to be for the January 1983 Lisa introduction at the Carlyle Hotel. 而那天恰好是198
Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can go from the science of the future to eve
周一到周五总是睡不够,可你知不知道,扰乱你一周睡眠规律的元凶竟然是上个周末!你是否也在周末睡懒觉、酗酒、和狂欢?这些都给你接下来一周的睡眠埋下了隐患。 We all like to let our h
Breaking up is hard to do. Whether youre doing the dumping or getting dumped, chances are you feel pretty upset. And theres a scientific explanation for this. 分手确实是件难事。无论是你甩了对方,还是对方甩了你,你都可能感
BEIJING, April 14 (Xinhuanet) -- Computer sales declined in the first three months of this year for the first time since 2009 worldwide. PC sales fell 1.1 percent in the first quarter to 84.3 million worldwide, according to tech research firm Gartner
Central banking can be agonising. The effect of monetary policy on the economy is not immediate, 中央银行可能很痛苦。货币政策对经济的影响并非即刻见效, so decisions must be based on expectations for two years' time. That me
China is now on the front lines of efforts to develop energy sources that can balance the goals of sustaining economic growth and protecting the environment. Decisive action is needed to strengthen policy frameworks across the country to reach that g
Once stimulated, these muscles go to work and cause us to forcefully expel air from the mouth and nose. Or, in other words, we sneeze. Because the nose lining tends to swell when we lie down, making it even more sensitive to sneeze-causing particles,