倍频程放大

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(145) / 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(153) / 评论(0) 分类 2013年VOA慢速英语(二)月

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(170) / 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(226) / 评论(0) 分类 2015年Scientific American(一)月

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(185) / 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(176) / 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(166) / 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(165) / 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(218) / 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(185) / 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(131) / 评论(0) 分类 VOA标准英语2012年(一月)

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(147) / 评论(0) 分类 TED演讲国际问题篇

One of my favorite stories comes from Frank Serafine. 我最喜欢的段子之一来自于弗兰克塞拉凡尼。 He's a contributor to our library, and a great sound designer for Tron and Star Trek and others. 他是我们音效库的贡献者之一,

发表于:2019-01-18 / 阅读(125) / 评论(0) 分类 TED演讲娱乐篇

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(238) / 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(196) / 评论(0) 分类 VOA常速英语2007年(十一月)

vibration 振动 sound 音 tone 音(乐音) musical tone 乐音 noise 噪音 acoustics 声学 psychoacoustics 心理声学 frequency 频率 intensity 强度 time 时间 wave form 波形 pitch 音高 loudness 响度 duration 时值 timbre 音色 (tone

发表于:2019-02-07 / 阅读(159) / 评论(0) 分类 英语口译

vibration 振动 sound 音 tone 音(乐音) musical tone 乐音 noise 噪音 acoustics 声学 psychoacoustics 心理声学 frequency 频率 intensity 强度 time 时间 wave form 波形 pitch 音高 loudness 响度 duration 时值 timbre 音色 (tone

发表于:2019-02-07 / 阅读(156) / 评论(0) 分类 英语口译

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(223) / 评论(0) 分类 2018年科学美国人10月

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(188) / 评论(0) 分类 双语有声阅读

关于band你知道多少?除了pop and rock band=流行摇滚乐队,你还知道什么乐队吗? 摇滚乐队叫rock band,经典的英伦摇滚乐队非Queen皇后乐队莫属啦。 敲锣打鼓前进的是marching band=行进乐队。 玩儿爵

发表于:2019-02-25 / 阅读(248) / 评论(0) 分类 英文语法词汇
学英语单词
abstentionists
Admiralty Draughtsmen's Association
ammonieal nitrogen
angelage
animal fanciers
annellations
arythmancy
australian kingdom
ball and roller
bezoardic
bhaktapur (bhadgaon)
blue butterfly
boss-man
breaking and entering vessel
bromothalonil
bunching up
byrdak
cabinet dryer
cardiac portion
cathode inductance
check of ship structure
cilleral
coitus incompletus
cold water stop valve
combing machine for fur
compressed gas automobile
concentrate pump
county councils
crustal flowage
cumuliformis
curtain-sermon
Dialister granuliformans
direction of translation
dirty code
disinures
duct keel
equality of educational opportunity
equivalent metric
exa-newtons
extruder
feedback control element
fixed cable reel
freely fluctuating exchange rate
Gentiana longistyla
geographic speciation
Greatworth
guarded pupa
hemolymphoid
hemorrhagic jaundice
infotechnological
inserton
Kitchewan
Kuttner's ganglia
language statement
leptophyllum
lindera thomsonii allen
Magunga
make my own way
military anthropology
Motswana
MSHRIF
Mårdsele
negative feedback system
neonatorum tetanus
noblesville
nonswimmers
Novell Inc
Novonikol'sk
number of items
Nærφy
parnesy
Pectinatus
perennial treatment
phaeomitra eremitarum
Poa hirtiglumis
Prochowice
railage
residence-based taxation
rett's syndrome
road machinery
safe driving glasses
sakalas
searchlight defense
Sedum pratoalpinum
sine die
space laboratory
stage managership
supersonic flame spraying
tactical operation system
Tambaoura, Falaise de
tanella zebra
tetrataenites
the SFO
toniclonic
tram
typal map
umbilical souffle
unintentionalness
universal structural mill
wet baffle chamber
yenans
zinc plating