单词：electron beam pumped semicon ductor laser
单词：electron beam pumped semicon ductor laser 相关文章
By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca
VOA常速英语2008年（四月）
澳洲流行天后 Kylie Minogue 最新MV《Crystallize》！小女孩演绎还没当歌星前的凯莉，拿着梳子对着镜子忘情歌唱，热舞。一代歌后的成长史呀，很励志的一首歌，有梦想就要去追逐。 歌词： When
流行英文歌曲
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
2013年VOA慢速英语(二)月
I'd like to start with a short story. 我想先讲个故事。 It's about a little boy 有个小男孩 whose father was a history buff 他父亲是个历史爱好者， and who used to take him by the hand 常牵着他的手 to visit the ruins of an
TED演讲科技篇
beam, [bi:m] n 大梁（建筑中用作支撑的木材、金属或石头）；光柱；臀围；平衡木 【船】横梁; 船幅; 船舷 (秤)杆; (犁)柄; (锄)把; 卷轴; 横杆; 杠杆 (鹿角的)主干 (灯光、日光、月光等的)束, 道,
不择手段背单词
The United States Navy has demonstrated a new laser weapon operating in the Persian Gulf. The Laser Weapons System, or LaWS, is deployed on the USS Ponce transport ship. A live test firing of the weapon was recently carried out for Cable News Network
2017年VOA慢速英语(七)月
Former U.S. Senator Jesse Helms, a conservative icon and opponent of U.S. foreign aid, died Friday at the age of 86. A spokesman says the former lawmaker died of natural causes in his home state of North Carolina. VOA's Kent Klein reports from Washi
VOA标准英语2008年（七月）
Bob Beamon established himself as the favourite in the 1968 long jump by winning 22 of 23 meets in the pre-Olympic season. He almost met with disaster in the qualifying round. After fouling his first two attempts, he had only one try left. His teamma
英美文化
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
2013年VOA慢速英语(五)月
Right on the beam To fly by the seat of his pants 美国英语当中有许多成语和俗语都和过去的历史有关系。例如，美国开拓西部的过程给美国语言增添了不少色彩。可
美国习惯用语
Dialogue 2 Xiao Gao: So? What did you think? Wasn't it fun watching these movies? 小高：怎么样，你觉得看这些电影有意思吗？ Jingjing: Yeah, it was,but I'm not completely satisfied yet. 京晶：确实挺有意思的，但是我还意
英语PK台
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
英语语言学习
By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti
VOA常速英语2007年（十一月）
The Olympic torch relay has entered its final leg in Beijing amid tight security and to the cheers of thousands of proud Chinese. The worldwide relay was meant to drum up support for the Beijing Games but was marred by protests against China's tough
VOA标准英语2008年（八月）
《Pumped Up Kicks》是该独立流行乐队Foster the People发行的第一支单曲，并且收录在了乐队的第一张同名EP中。这支单曲的曲子写于歌词前，节奏明快带有重低音并且混合了电子和原声两种不同的元
英文特辑精选
现代汉语中有不少词都是英语外来语，High这个词就常和汉语一起混用，可是它真正的意思并不是开心，今天Jenny和Adam要来谈谈美国人怎么使用high。 High有什么问题？ 大家都很熟悉high的中国式
美国文化脱口秀
Science and technology 科学技术 Solar power from space 太空太阳能 Beam it down, Scotty 老兄，传下来吧 Harvesting solar power in space, for use on Earth, comes a step closer to reality 在太空获取太阳能以供地球之用:梦想距
经济学人科技系列
Most of the oil has now been pumped out of the ship, the Rena, which hit a reef on October 5th. The ship carried 1700 tonnes of heavy oil. 350 tonnes leaked into the sea. This oil killed more than 1300 sea birds and polluted the sand and rocks around
新西兰英语
Neutrons and protons occupy the atom's nucleus. The nucleus of an atom is tinyonly one millionth of a billionth of the full volume of the atombut fantastically dense, since it contains virtually all the atom's mass. As Cropper has put it, if an atom
万物简史
今天早上 Larry 和李华和一对朋友 Charles and Lisa 约好了一起去打网球．李华会学到两个常用语： pumped 和iffy. LL: I'm really pumped about today's tennis match. How about you, Li Hua? LH: 你对今天的比赛怎么啦？ Pumped？你是不是说你很紧张啊？ LL: No, I'm
美国之音《流行美语》