电流放大率

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(131) / 评论(0) 分类 美丽新世界

Last week, we talked about Americans taking college classes and completing study programs online that is, with the help of computers and over the Internet. The United States Department of Education has noted the growing popularity of online degree pr

发表于:2018-12-07 / 阅读(152) / 评论(0) 分类 2017年VOA慢速英语(四)月

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(131) / 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(153) / 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(195) / 评论(0) 分类 2015年Scientific American(一)月

I love the news and current events. Im addicted to whats happening in the world. It doesnt matter what kind of news it is, I love watching it. Even if its from countries Ive never heard of. Ill even watch the same news programme three or four times a

发表于:2018-12-26 / 阅读(162) / 评论(0) 分类 纯正英语一分钟

In 2012, Rena Sard was sentenced to five years in prison at the Maryland Correctional Institute for Women. She was 47 years old. I didnt have five years of my life to wasteSo, every chance that I had to do something that was productive, something tha

发表于:2019-01-03 / 阅读(210) / 评论(0) 分类 2017年VOA慢速英语(十二)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(152) / 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(146) / 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(148) / 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(200) / 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(170) / 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(118) / 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(128) / 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(203) / 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(173) / 评论(0) 分类 VOA常速英语2007年(十一月)

College graduates who took a detour around the weak job market by going back for advanced degrees are beginning to emerge from those programs-and finding job prospects aren't much better than they were a couple of years ago. The jobless rate for 20-

发表于:2019-02-02 / 阅读(185) / 评论(0) 分类 阅读空间

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(199) / 评论(0) 分类 2018年科学美国人10月

BEIJING, July 16 (Xinhua) -- China on Monday began soliciting public opinion on draft regulations for the punishment of fraudulent behavior in granting academic degrees, a move expected to curb fraud and plagiarism in higher-learning institutions. Sp

发表于:2019-02-19 / 阅读(206) / 评论(0) 分类 英语新闻

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(169) / 评论(0) 分类 双语有声阅读
学英语单词
3N-
a field army
aaces
Achaemenian Dynasty
actinomycin-ks4
Albemarle, Sound
anagnostic
average annual capacity factor
batch stone
bayesian approach
bergdoll
boiling flask
burgone
calcium-48
cannonades
cell roll
ceropria schenklingi
cholecystoptosis
clear cell carcinoma
closed population
cockle-stool
combination valve
complacence
completion of field
cornhill
crystal laser
dam ... up
deer-stealers
deodorizing technology
dextro-compound
diffused line
Dominica
double anlge formula
double-directional focusing
duck wrapped in lotus leaf
electronic cooler
electrothermal defrosting system
emane
endosulfan
English as she is spoke
Exception confirms the rule.
fast automatic gain control
feed cell
fibrae primitiva
fibrous stratum
fire control systems
free on board port of shipment
harakeke
harthill
heart-splitting
hogging ejector
horny tooth cuticle
Hygrophorus turundus
Hytuss
idiotypia
kincoras
Littleton.
long extensor muscle of thumb
make out of whole cloth
marine pendulum
Matlock
micromorph
mining property
mohebbi
multiple-chain drag conveyer
nintus
nomograph
non-oscillatory circuit
nosed out
penetromete
phigs
poa annua l.
poll-takers
premonitors
presidium
punched-barb spindle
rated engine speed
real quadratic field
receiving slit
reimaruss
replica theory
rhodamin
Schleswiger
semiconductor intrinsic properties
silkens
simulated echo pattern
spun barrel reflector
stephanii
tailed toads
thermal contact resisance
three-breed rotational crossing
tjalk
tocopherols
tumor-free
turn in to
voluntary auction
wash thickener
waterpress
weft fork spindle
whip grafting
with a shudder of horror
work&materials clause