un. 扇形激光束
[网络] 扇形光栅

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

发表于:2018-12-08 / 阅读(129) / 评论(0) 分类 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

发表于:2018-12-14 / 阅读(106) / 评论(0) 分类 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

发表于:2018-12-16 / 阅读(113) / 评论(0) 分类 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

发表于:2018-12-18 / 阅读(87) / 评论(0) 分类 TED演讲科技篇

[00:01.13]2 Pronunciation Listen and say. [00:06.19]Do you know how the fan works? [00:09.33]Do you know why the bell is ringing? [00:12.62]Can you tell me what time the lunch break is? [00:17.34]Can you show me how the photocopier works? [00:25.48]3

发表于:2018-12-29 / 阅读(132) / 评论(0) 分类 外研社新标准初中英语八年级

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,

发表于:2018-12-30 / 阅读(126) / 评论(0) 分类 不择手段背单词

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 serious [ 5siEriEs ] The mistake is no

发表于:2018-12-30 / 阅读(132) / 评论(0) 分类 每日攻克5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

发表于:2019-01-02 / 阅读(125) / 评论(0) 分类 2017年VOA慢速英语(七)月

This is All Things Considered. I'm Michelle Norris. Phone calls from Sweden woke up two American scientists this morning, John Hall and Roy Glauber. They will share the Nobel Prize for Physics with a German Researcher Theodor Haensch. All three worke

发表于:2019-01-08 / 阅读(189) / 评论(0) 分类 2005年NPR美国国家公共电台

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

发表于:2019-01-08 / 阅读(193) / 评论(0) 分类 英美文化

Fins 鱼鳍 Fish can swim well with their fins in water. 鱼因为有鳍能在水里畅游。 Also, fish cannot move without fins. 相反的,没有鱼鳍,鱼就不能游了。 Do you know that different fish have different shapes of fins? 你知道

发表于:2019-01-10 / 阅读(141) / 评论(0) 分类 与美国小学生一起学英文第6册

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

发表于:2019-01-12 / 阅读(172) / 评论(0) 分类 2013年VOA慢速英语(五)月

EXPLORATIONS - The Laser: Futuristic Science Found at Your Local Store MARIO RITTER: 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

发表于:2019-01-12 / 阅读(141) / 评论(0) 分类 2012年VOA慢速英语(一)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

发表于:2019-01-14 / 阅读(198) / 评论(0) 分类 美国习惯用语

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

发表于:2019-01-24 / 阅读(156) / 评论(0) 分类 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

发表于:2019-01-31 / 阅读(145) / 评论(0) 分类 VOA常速英语2007年(十一月)

pear-shaped的本义是“梨形的、底宽顶窄的”,它通常可以引申为另一个意思:“全完了,都毁了”。 这种用法最早出现在20世纪60年代,由英语短语go pear

发表于:2019-02-03 / 阅读(159) / 评论(0) 分类 英文语法词汇

Blimey!这是人们在表示惊讶时常用的表达方式。例如, Blimey! The weathers terrible today! Keep your hair on.你的头发并不是要往哪个方向。 这个表达方式其实是表示保持平静,Keep your hair on. Its an easy pr

发表于:2019-02-04 / 阅读(132) / 评论(0) 分类 实用英语

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

发表于:2019-02-16 / 阅读(139) / 评论(0) 分类 经济学人科技系列

Todd: So, Melissa, the Super Bowl is coming up. And what do you think about football? Melissa: I think it's really interesting. This Japanese guy recently told me it was the most interesting sport to watch because of the rules, but unfortunately I do

发表于:2019-02-24 / 阅读(145) / 评论(0) 分类 英语趣味课堂
学英语单词
Aatxe
agrame
amplifier-type voltage regulator
any money
automatic closed-loop control system
aweing
bahu
banker letter of credit
banthine bromide
bioproperty
bulk compressibility
burst through
Buyukorhan
capital recovery factor
circular permutation
Darta
daxers
decarbonizer
Department of Political and Security Council Affairs
Deuben
devegan
dielectrometric titration
difforme
directioal valve box
disk file organization
divide et impera
Doppler bank
dot raster character generator
dumpty
ECPA
elastic energy
entrance into
epigene action
fiber optic multiplexer
floating dry dock hull workshop
floopy diskette
Flying Dutchmen
gas devourer
Handelians
harste
Hessmer
heterogeneous microprocessor
hexer
hypoploid
hyposecretory
in sight of one another
inclined parking
infiltration tunnel
intergranular precipitation
isomagnetic line
Jacarei
job account
key connection
Knoop indentation test
line blanketing index
lowsodium
mackies
macroconcentration
Marcinkowice
metropolitan region
mopsical
narrow fabric loom
narsco
Nimberra Well
non-blank input column
nonresidue
optically excited laser
orchiditis
order of operation
OUSD
oxypropionic acid
papelis
pole line hardware
preestablishes
private lines
process surveillance
protection and indemnity association
pulse blocking
quartz coupler
R plasmid
railway rolling stock
rheological formula
rosine
ryukyus
S-acid
San Giovanni Lupatoto
Schindleriidae
series interface board
shoe pitman
skulduggeries
small particle contamination
soviet-eras
Streptococcus conglomeratus
sweater girl
the bronco
thermotolerances
tryptokinase
twin single pump
usher out
Vwaza Game Reserve
well-gifted
wing a flight