双放大电路

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(154) / 评论(0) 分类 美丽新世界

1933 、 点 dot 1934 、 点阵间距;点阵间隔 latticespacing 1935 、 点焊接 spotwelding 1936 、 醛树脂;电玉 ureaformaldehyde(UF) 1937 、 断面线 crosshatchingline 1938 、 断裂

发表于:2018-12-08 / 阅读(149) / 评论(0) 分类 英文名句短语

Little Johnny is talking to his mother. J: How come you always make me do things I don't want to? M: What do you mean? J: Well, for instance, you always force me to eat steaks, pork chops and chicken,

发表于:2018-12-08 / 阅读(256) / 评论(0) 分类 赖世雄中级美国英语

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(164) / 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(181) / 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(235) / 评论(0) 分类 2015年Scientific American(一)月

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(189) / 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(178) / 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(177) / 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(229) / 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(195) / 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(143) / 评论(0) 分类 VOA标准英语2012年(一月)

Maryland Couple Makes Beautiful Objects From Recycled Circuit Board There is no shortage of recycled material for Debby Arem's creations. She uses everything, from pieces of scrap metal and electronic components, to computer circuit boards and chips.

发表于:2019-01-13 / 阅读(226) / 评论(0) 分类 VOA标准英语2012年(三月)

今天我们要讲几个在美国总统大选的竞选阶段常会用到的习惯用语。美国总统大选每四年举行一次。在大选年的前一年,准备竞争本党总统候选人提名的人士就已经在各州积极展开竞选活动了,

发表于:2019-01-16 / 阅读(272) / 评论(0) 分类 美国习惯用语

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(157) / 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(255) / 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(209) / 评论(0) 分类 VOA常速英语2007年(十一月)

TUNIS, March 24 (Xinhua) -- Elena Svitilona of Ukraine won the la Marsa Open after beating Bulgaria's Isabelle Shinikova 7-6, 7-6 in the final on Saturday in the north of the capital. On Friday, Svitilona easily defeated Tunisian hopeful Ons Jabeur,

发表于:2019-02-06 / 阅读(234) / 评论(0) 分类 英语新闻

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(233) / 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(200) / 评论(0) 分类 双语有声阅读
学英语单词
Addams Family, the
air-stowing machine
amputation of penis
analysis centre
anaphoresis
antimony regulus
arsenic white
ash shumaysi (shumaysah)
asplenium holophyllum bak.
auto-pulse magnetic fuel pump
autocollimatior
ballast control room
basal anesthesia
be known as
Bitterbush
boiling water reactor (bwr)
Canistota
ccbc
charge machine grab
cold steel
coved checker ceiling
curve of approximation
CWIS
degroup
delaying power
demurrage cost
dolomitising
emphysematous anthrax
even header
fastish
four party line
Geoagiu
Ghelari
girodet
golisano
gramphone
Guantian Township
half-monthly
immune response
influence characteristic
instrument relay
intergrowth
Izembek National Wildlife Range
judgement receivable
Loriinae
lupper
mac-and-cheese
microsoft intellimouse explorer
middle of turntable
nebbier
Nittenau
non pensionable services
nonoxynol nonylphenoxy-polyethoxyethanol
not as
novos
occipitofacial
on the horns of dilemma
outdrives
output coefficient
override price
pencil gate
pimeloma
polyisocyanurate
radio echo methods
reinforced cloth
response contour
reversal tidal current
rey testing
Roscommon
salicet
saprotrophs
sever supply
sharecapital
signaling information
silicon carbide grinding wheel
Sindanyo
size concentration
solid-liquid equilibrium
Spioenkopdam
spiral pattern of change
ST_fear-and-danger_doing-things-without-fear-or-proper-thought
structure of threshold function
tactical unit
takeoff climb
tetradecanol
Theileria
thermometer screen
trade (brand)name
trading warehouses
twinned composite
ultraviolet ray treatment
underperforms
unformalizable
uniaxial accelerometer
us court of appeals
v?lknerite (hydrotalcite)
value-for-money criterion
wampum
xylic acid
yellow asphodels
yes-no
yo'selves