射束分散,波束分散

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(152) / 评论(0) 分类 不择手段背单词

Welcome to Talking Sport! Today we meet a male gymnast from the UK. Louis Smith is already an Olympian. Louis won a bronze medal in the Beijing Olympics for his performance on the pommel horse. He is hoping to win another medal at this year's Olympic

发表于:2019-01-05 / 阅读(143) / 评论(0) 分类 伦敦谈体育

This is Scientific American's 60-Second Science, I'm Christie Nicholson. Got a minute? If youve spoken to anyone in New York City, where Scientific Americans offices are, then youve heard about the rain, every day since mid-June. Still, were not in t

发表于:2019-01-08 / 阅读(159) / 评论(0) 分类 Scientific American(七)月

1. Authorities in Utah say they found no signs of six trapped miners when they lowered a camera down to where they think the men are located. This is their second effort to make contact with the men. Yesterday a microphone was lowered down to a separ

发表于:2019-01-08 / 阅读(211) / 评论(0) 分类 美联社新闻一分钟2007

[00:00.00]change one's mind anyhow argument misunderstanding [00:05.09]改变注意 ad.不管怎样 n.辩论 n.误会,误解 [00:10.19]ashamed Cincinnati counter disappointment [00:14.72]a.惭愧,害臊 n.辛辛那提(美国城市) n.柜台 n.失望;

发表于:2019-01-08 / 阅读(333) / 评论(0) 分类 高中英语词汇

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(218) / 评论(0) 分类 英美文化

This is the VOA Special English Health Report. Governments, businesses and other groups have promised to add three billion dollars to the fight against malaria. The promises came last week at a meeting at the United Nations in New York. The money wi

发表于:2019-01-11 / 阅读(169) / 评论(0) 分类 VOA慢速英语2008(十)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(229) / 评论(0) 分类 美国习惯用语

A: I'd like to order a restock on my minibar. B: You finished everything in there, sir? A: Absolutely everything. B: What would you like to order? A: Three bottles each of Perrier and Jim Beam. B: Uh-huh. What else do you want? A: The apples were gre

发表于:2019-01-15 / 阅读(177) / 评论(0) 分类 英语情景对话-旅馆

A: I need my minibar restocked. B: Everything is gone, sir? A: There's not a drop left of anything. B: Is there anything in particular you'd like? A: Yes, the Perrier and the Jim Beam hit the spot. Let me have three more of each. B: Got it. Anything

发表于:2019-01-15 / 阅读(156) / 评论(0) 分类 英语情景对话-旅馆

A: Hi. My minibar is empty. B: You already finished off everything, sir? A: I finished off everything. B: Would you like anything in particular? A: The Perrier and the Jim Beam. Let me have three more of each. B: Beam and Perrier. Anything else, sir?

发表于:2019-01-15 / 阅读(160) / 评论(0) 分类 英语情景对话-旅馆

A: Hello! How do I restock my minibar? B: You've drunk everything, sir? A: I finished it all. B: Do you want the whole minibar, or just certain items? A: Send me up three bottles each of Perrier and Jim Beam. B: That's three Jim Beams and three Perri

发表于:2019-01-15 / 阅读(171) / 评论(0) 分类 英语情景对话-旅馆

A: My minibar is completely empty. B: Everything in that minibar has been consumed, sir? A: Everything's gone. B: Is there anything special you'd like? A: Just bring me three bottles each of Jim Beam and Perrier. B: Okay, sir. Three of each. Would yo

发表于:2019-01-15 / 阅读(172) / 评论(0) 分类 英语情景对话-旅馆

smirk vi.傻笑; 假笑着说; grin v. 露齿而笑,咧着嘴笑 beam vi. 照射;堆满笑容 laugh v.哈哈大笑 register vt.表示,表达; (感情) 流露; 如果单纯从中文的翻译还是很难深刻理解这几种笑的不同,可以

发表于:2019-01-17 / 阅读(143) / 评论(0) 分类 卡卡课堂早餐英语

It's time to bring total strangers together in a game we're calling Walk the Plank. 该把陌生人们聚到一起了 通过我们叫做走跳板的游戏 Alright let's find our contestants,Twitch you know who they are? - I do. 让我们的选手上台

发表于:2019-01-28 / 阅读(121) / 评论(0) 分类 艾伦脱口秀

1. 动词be的否定式 动词be根据不同的人称和时态可以有am, is, are, was, were等不同形式,可用作连系动词(表示是、在等)和助动词(用于构成进行时态和被动语态等),但不管何种情况,构成否定式时

发表于:2019-02-02 / 阅读(112) / 评论(0) 分类 实用英语

If you are someone who types a furious text message, only to reconsider and edit it before hitting send, you may be in trouble. The Beam Messenger app shows everything another person is typing in a text message as they type it. This means that if you

发表于:2019-02-06 / 阅读(119) / 评论(0) 分类 阅读空间

1.poker face 面无表情的人 例如: I never know whether my boss likes my work or not -- he is a real poker face! 我从来也不知道我的老板到底喜不喜欢我的工作。他脸上可真是一点表情都没有。 2.The shoe is on the

发表于:2019-02-09 / 阅读(175) / 评论(0) 分类 阅读空间

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(166) / 评论(0) 分类 经济学人科技系列

Scientists with the European Organization for Nuclear Research, or CERN, have begun working again after a two-year hiatus. The Large Hadron Collider was shutdown in 2013 for a major refit. It's allowed for its power to be doubled, enabling scientists

发表于:2019-02-18 / 阅读(121) / 评论(0) 分类 英语新闻
学英语单词
2-chloro-2-diethylcarbamoyl-1-methyl-vinyl dimethylphosphate
a death blow
accessorizing
Afognak Island
air conditioned cabin
allegoriseed
anorthitite
Apertura externa aqueductus cochleae
aquavitae
Association of South East Asian Nations
autogenic movement
axitirome
Badong Formation
bielles
big-talking
brachiofaciolingual
buy down
C battery substation
call back apparatus
canker sores
cephalogensis
cholesteatomata
coal conversion
dansks
dauntless
distribution statement
double-jgroove
Duque de York, Isla
dye standards
Dzmitravichy
equity share
esculate
ethnic identity
extracurrent
final channel
flawlessness
frost-making
gas dynamic facility
Henry Jarvis
ignoscible
in chronological order
ingelds
intermediate syndrome
lagship product
Lane's band
lassen volcanic national parks
leakage-check test
left-associative
mabuprofen
make compensation for
malt drying
marginal cost of capital
mcgushin
mealie meal
mis-matching
misheant
nautilus shell
nephrospasis
Nicodemism
nitro-hydrochloric acid
non relativistic particle
noninterchangeable
obcordellum
on its own intiative
open carbon arc lamp
over-temperature
pepsinuria
phonesthemic
pickle injector
pneumonography
ppps
prism-like structure
recording label
refuse incineration furnace
repressive state apparatus
restoring relay
reverse regression
ribes latifolium jancz
robert anson heinleins
roommateship
sewing kits
short-period fluctuation
shreive
side cutting edge
sinularia wanannensis
Sister of Providence
soothless
Sranan Tongo
starting vector
steel strip die
Strydpoort
supervision of train running
thanna
thiocyanate porosity test
torsion rod
two position winding
valve stem gland
vasculoneuropathic
vewlie
wet-shod
windsor
xxxl