宽(频)带放大

Splendid! He kept his telescopic cameras carefully aimedglued to their moving objective; 精彩片他小心地调着望远摄影机的镜头,盯紧了那移动着的对象。 clapped on a higher power to get a close-up of the frantic and distorted

发表于:2018-12-07 / 阅读(92) / 评论(0) 分类 美丽新世界

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(89) / 评论(0) 分类 2013年VOA慢速英语(二)月

涨知识,一起来学这些和Broad相关的单词。 1. in broad daylight(光天化日之下) The robbery occurred in broad daylight, in a crowed street. 在一条熙熙攘攘的街道上,光天化日之下就发生了抢劫。 2. broadband n.宽

发表于:2018-12-19 / 阅读(99) / 评论(0) 分类 卡卡课堂早餐英语

BBC News with Julia Candler. A senior member of North Koreas government has warned that his country would react with a pre-emptive nuclear strike if it saw signs that the US was preparing to launch an attack. Speaking to the BBC, the Vice Foreign Min

发表于:2018-12-20 / 阅读(90) / 评论(0) 分类 中英双语新闻

This is Scientific American's 60s Science. I'm Karen Hopkin. This will just take a minute. Think about the tools used by biologists, perhaps test tubes and microscopes come to mind. But what about diapers? No, it's not the investigators in their work

发表于:2018-12-24 / 阅读(101) / 评论(0) 分类 2015年Scientific American(一)月

发表于:2018-12-25 / 阅读(135) / 评论(0) 分类 中式口语纠错

band, [bnd] n 带,条纹=strip;乐队;v 联合 【例】jazz band 爵士乐队We banded together against the robbers 我们联合起来对付强盗。 【类】stipple:dot=striate:band 有点的由点组成=有条纹的由条纹组成

发表于:2018-12-30 / 阅读(112) / 评论(0) 分类 不择手段背单词

In my lab, we recently made a cancer nanodetector 在我的实验室,我们最近研制出了一种癌症纳米检测器, that is so small that it could travel into the body and look for tumors. 小到可以进入全身血液循环并寻找肿瘤。

发表于:2019-01-03 / 阅读(106) / 评论(0) 分类 TED演讲科学篇

PCRthe polymerase chain reactionis a crucial tool. The DNA amplification technique is used in genome sequencing, forensics and the diagnosis of various diseases. To give researchers more genetic material to work with, a PCR instrument repeatedly heat

发表于:2019-01-08 / 阅读(90) / 评论(0) 分类 Scientific American(十)月

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

发表于:2019-01-08 / 阅读(108) / 评论(0) 分类 Scientific American(三)月

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(147) / 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(111) / 评论(0) 分类 2012年VOA慢速英语(一)月

'Word on Street' Impacted Language in 2011 While 2011 is over, some of the words that came to define the past year are still very much with us, and may be for years to come. Since 2011 was an especially busy year for grassroots political action, many

发表于:2019-01-13 / 阅读(78) / 评论(0) 分类 VOA标准英语2012年(一月)

STEVE INSKEEP, HOST: We have the story this morning of a patent - a very, very lucrative patent. DAVID GREENE, HOST: It is for a tool called CRISPR. Sounds like a kitchen instrument, doesn't it? But it's actually a high-tech gene-editing tool. INSKEE

发表于:2019-01-16 / 阅读(86) / 评论(0) 分类 2017年NPR美国国家公共电台2月

Because of course, the ear is, I mean, subject to all sorts of things. 这当然是因为,我是说,耳朵受制于很多因素。 The room we happen to be in, the amplification, the quality of the instrument,the type of sticks...etc., etc. 我们现

发表于:2019-01-18 / 阅读(86) / 评论(0) 分类 TED演讲国际问题篇

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(131) / 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(125) / 评论(0) 分类 VOA常速英语2007年(十一月)

Nobel in Physics for Controlling Laser Light 诺贝尔物理学奖颁给激光控制实验者 The main practical application of CPA so far has been in the eye surgery. It was the first one, and I think it is the one that is used by the most people fo

发表于:2019-02-14 / 阅读(108) / 评论(0) 分类 2018年科学美国人10月

Past country lines and interstate signs We were here to sing, to shadow an endless dream Left the family, backstage we met You were writing your set We talked till the owner swept Outside the big great door But don't look at me this way In the broad

发表于:2019-02-19 / 阅读(92) / 评论(0) 分类 美国乡村音乐

The Revolution in American Higher Education To produce the upheaval in the United States that changed and modernized the domain of higher education from the mid 1860's to the mid 1880's, three primary causes interacted. The emergence of a half dozen

发表于:2019-02-25 / 阅读(116) / 评论(0) 分类 双语有声阅读
学英语单词
a taco
acetarson
ailing
alpine silicated raw soil
anti-backlash driving
antiwart therapy
Arno River
arteriae digitales volares propriae
beechcrafts
boil-over
breaking down
cablelike
capacitive emf
capacity loading and scheduling system
cellular autonomy
certner
chenopodoside
chilling machine (chiller)
code selector
commuting matrices
compound pressure and vacuum gage
conditioning agent
cooling-water leakage detector
Couphochlore
crosscompatibility
cubed
cutinites
cytofluorograft
Daboia elegans
differential density separation
digestion-promoting prescription
downstream section
drill jig for air cylinder
drum-type pickup
dynamic formula for piling
enantioselection
extend into
falling of blossom
fasciculi thalamomamillaris
fuel element deposits
furnace-cooling
Galicians
gaussian randomprocess
gorbuscha
gum stick
hinge axis point
hollow ball
hot plug
ideal operational amplifier
independent wholesaler
keratotom
L. I. F.
lateral binding
LMWH
locking wedge
minimum value point
misframing
mortgage-market
neutron soil-moisture meter
Nezelof
not-I
ooloid
orsay
pear gauge
phlebopexy
phytobacteriomycin
plane-tree
plough-like farm tool
Pontriagin's maximum principle
preadaptive mutation
protolophule
pseudoileus
radiator core cleaner gun
radioiodin uptake (raiu)
receiving blanket
reciprocating type supercharger
reinstitutionalizations
reinsurance credit
relative conversion ratio
replacement tanning agent
rieng
sector
self adjusting expansion chamber
Sohna
somoun
stable price
submerged pipe
Swedish torch
syndrome of external wall of cavernous sinus
tape feed switch
total float
true to one's colors
Trévillers
Ubauro
US Marshals Service
vacuum capacitor
vessel internals
viagra
visceroptosis
voyage letter
witold