模拟转换

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Whether it's for streaming Netflix or sharing files, we're gobbling up more and more dataand we want it faster. But even shooting data with lasers over fiber-o

发表于:2018-12-24 / 阅读(173) / 评论(0) 分类 Scientific American(五)月

This Cell Phone Needs No Battery 不用电池的新型手机? A dying battery is a huge annoyance for cell phone users. But for engineers? It's inspiration. Can we design a smartphone which can make a phone call and have a conversation without the

发表于:2018-12-24 / 阅读(128) / 评论(0) 分类 2017年科学美国人(七)月

PPSN public packet switched network Premises Distribution System (PDS) PDS is the transmission network inside a building or among a group of buildings, for example an office park or a campus. PDS is u

发表于:2019-01-03 / 阅读(137) / 评论(0) 分类 电信英语

发表于:2019-01-03 / 阅读(147) / 评论(0) 分类 电信英语

Multimode Optical Fiber(S) Multimode fibers, with much wider cores than single mode fibers, allow light to enter at various angles, and reflect (bounce off of) core-clad boundaries as electromagnetic

发表于:2019-01-03 / 阅读(159) / 评论(0) 分类 电信英语

Frame In time division multiplexing systems, Frame is a sequence of time slots each containing a sample from one of the channels carried by the system. The frame is repeated at regular intervals, (nor

发表于:2019-01-03 / 阅读(152) / 评论(0) 分类 电信英语

Analog - Transmitting information that is characterized by continuously variable quantities (such as with AM or FM). This is different from digital transmission, which is characterized by discrete bit

发表于:2019-01-03 / 阅读(218) / 评论(0) 分类 电信英语

By Craig McCulloch Vancouver 13 May 2006 In February of 2009 all television stations in the United States are required to convert to digital transmission. This move will bring an end to traditional an

发表于:2019-01-04 / 阅读(213) / 评论(0) 分类 2006年VOA标准英语(五月)

The government reports the nation's Gross Domestic Product fell one percent in the first quarter, a far slower contraction than the previous quarter when GDP shrank 6.4%. President Obama called it progress resulting from his administration's actions

发表于:2019-01-08 / 阅读(174) / 评论(0) 分类 2009年NPR美国国家公共电台8月

AS IT IS 2015-05-12 South African's Love Affair with Vinyl Records 南非与黑胶唱片的情缘 Benjy Mudie owns Vinyl Junky. He flips through records inside his Johannesburg store. His vinyl albums are much more expensive than CDs or MP3s - digita

发表于:2019-01-12 / 阅读(115) / 评论(0) 分类 2015年VOA慢速英语(五)月

Britons have been watching almost 2-1/2 hours more television a week this year as cash-strapped people stay at home more -- and because there's more to watch, figures showed on Tuesday. Official statistics from The Broadcasters' Audience Research Boa

发表于:2019-01-15 / 阅读(166) / 评论(0) 分类 实用英语

Which is the hardest word to translate in this sentence? 哪一个单词是这个句子中最难翻译的? Know is easy to translate. know是很容易翻译的。 Pep rally doesn't have a direct analog in a lot of languages and cultures, but can be

发表于:2019-01-17 / 阅读(150) / 评论(0) 分类 TED演讲教育篇

The Blue Box 蓝盒子 The ultimate combination of pranks and electronicsand the escapade that helped to create Applewas launched one Sunday afternoon when Wozniak read an article in Esquire that his mother had left for him on the kitchen table. 恶作

发表于:2019-01-22 / 阅读(153) / 评论(0) 分类 乔布斯传

SCIENCE IN THE NEWS - Rethinking the Personal Computer in a World That Centers on the InternetBy Caty Weaver and produced by Mario Ritter Broadcast: Tuesday, August 15, 2006 VOICE ONE: This is SCIENCE

发表于:2019-01-30 / 阅读(176) / 评论(0) 分类 2006年慢速英语(八)月

Abrupt junction 突变结 Accelerated testing 加速实验 Acceptor 受主 Acceptor atom 受主原子 Accumulation 积累、堆积 Accumulating contact 积累接触 Accumulation region 积累区 Accum

发表于:2019-02-05 / 阅读(173) / 评论(0) 分类 实用英语

中国富煤缺油少气的能源资源特点,造成能源消费主要依赖于煤炭,石油则主要依靠进口,而且带来一系列环境问题。煤清洁转化技术则可以帮助缓解这一难题。近日专家表示,我国将在2020年

发表于:2019-02-06 / 阅读(193) / 评论(0) 分类 实用英语

当很多成人还在等待苹果的iWatch上市,孩子们已经可以拥有自己的智能手表了。Kidizoom推出一款名为Vtech的儿童智能手表准备抢滩节日玩具市场。 这款儿童智能手表售价60美元,屏幕1.4英寸,可

发表于:2019-02-06 / 阅读(235) / 评论(0) 分类 阅读空间

To the surprise of exactly no one, Apples new generation of iPhones will not include a standard 3.5mm headphone input. The decision signals the demise of an audio port thats been used for more than 100 yearsand honestly, its about time. The death of

发表于:2019-02-06 / 阅读(181) / 评论(0) 分类 阅读空间

常用句型科技文章中经常使用若干特定的句型,从而形成科技文体区别于其他文体的标志。例如Itthat结构句型;被动态结构句型;结构句型,分词短语结构句型,省略句结构句型等。 举例如下

发表于:2019-02-18 / 阅读(157) / 评论(0) 分类 英语口译

The humanitarian model has barely changed since the early 20th century. 人道主义的模型自从20世纪初期就几乎没有改变过 Its origins are firmly rooted in the analog age. 它的起源在模拟时代就根深蒂固了 And there is a ma

发表于:2019-03-04 / 阅读(195) / 评论(0) 分类 TED演讲教育篇
学英语单词
all the marbles
antidebate
artificial aging
astrophotometric
b.eds
basic load
Basidiolichens
beauty-specialist
Bill 'Bojangles' Robinson
blinding ticking
blown jacket
carded packaging
cardiac neurasthenia
carellas
centropliorus atromarginatus
chock
cicatricial contracture
circumvaginal
come in for sth
complects
detraditionalised
disciplinary rule
double crank shaft engine
Early Termination Clause
electronic sketchmaster
elsheimer
exhaust vertical pipe
extruder screw
Farrsville
feedback rule
fiery
fracture-dislocation of thoracic vertebral body
genophytes
glass-lined pipe
grass crap
harsh chemicals
heavy oil heater
hemasthenosis
Herissantia
Hobbists
honeynets
integrated square error
Japanese vellum
jihadises
kaufman assessment battery for children(kabc)
key washer
kugelis
lateral bicipital sulcus
Le Château-d'Oléron
leakage discharge
leisure-time activity
Lokoro
Los Platanillos
lose one's reason
mammee apple
management operation
Messingen
meter constant
microvoltmeter
microwave terminal station
moynant
musetta
nordisks
obscenities
occidentalol
oh my God
oldcastles
open select alternative
optical multiplex section
pedunculated polyps
photoactive
processor controlled translation memory
rack-and-panel connector
Refugian
refutation graph
rubricaule
science-writings
sclerosing lymphangitis
seghesio
selenophysical phenomena
self-inquiry
semi-fixed pipeline system
semicircular beta spectrograph
sessile-flowered oak
sight reduction tables
sir james pagets
snowing under
spotty steel
Stimson, Henry Lewis
subject-predicate
supercinema
technical stop
travelling head veneer jointer
trustee council
turbojet engine
ultrapepton
unchristly
uniformly almost periodic function
unlearns
upperlip
vassalry
Vineuil