生物放大效应

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(234) / 评论(0) 分类 美丽新世界

Broadcast: Jan 10 2003 The Pentagon has issued a statement 2) asserting the military is prepared to protect its personnel from possible biological weapons attack. On the surface, the Pentagon's assert

发表于:2018-12-08 / 阅读(230) / 评论(0) 分类 VOA2003(上)-健康之旅

Have you ever thought about your biological clock? Never! No. Men don’t have to think about that. Men may not think about their biological clocks, but they should. There are some men whose biologica

发表于:2018-12-11 / 阅读(285) / 评论(0) 分类 万花筒2006年

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(277) / 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(240) / 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(323) / 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(253) / 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(269) / 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(273) / 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(342) / 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(307) / 评论(0) 分类 2012年VOA慢速英语(一)月

By Lisa Schlein Geneva 20 November 2006 U.N. Secretary-General Kofi Annan is urging nations to do more to combat biological weapons, and to create global safeguards to keep them out of terrorist hands. Kofi Annan at a review conference on Biological

发表于:2019-01-12 / 阅读(343) / 评论(0) 分类 2006年VOA标准英语(十一月)

'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(211) / 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(207) / 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(368) / 评论(0) 分类 英语语言学习

AGRICULTURE REPORT - Biological Controls, Part 1 By Mario Ritter Broadcast: Tuesday, April 13, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Biological controls are living

发表于:2019-01-30 / 阅读(268) / 评论(0) 分类 农业与发展

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(303) / 评论(0) 分类 VOA常速英语2007年(十一月)

Israel Practices Biological Attack Response The Israeli government has carried out a two-day exercise it says is aimed at boosting preparedness for any terrorist attack aimed at sparking an outbreak of a highly contagious disease. Israeli officials e

发表于:2019-02-12 / 阅读(290) / 评论(0) 分类 VOA标准英语2011年(十二月)

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(351) / 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(292) / 评论(0) 分类 双语有声阅读
学英语单词
a few of sticks of furniture
abluvion
active satellite attitude control system
agony uncles
alternative learning environments
american association for advancement of science
area-altitude curve
Armstrong line
asseverative
asterina triumfetticola
beta-structure
biologies
biphase rectification
bovovaccine
buhagiar
chinotoxine
cold pressed juice
come home to sb
commodities are available without restriction
condition of divergence
conical hat
conjuring trick
contact clamp
coudert
credito
cup drawing
dispersing pathogenic wind
duren (darin)
ed-
ehsan
engine moment
entropy of dyeing
equatorial face
exposure to
factor relations of index
false cone of silence
flin
free-space administration
gas mark
geothelphusa candidiensis
incorporated pocketbook
kick the clouds
Kronecker delta
Las Norias
light intensity meter
Listafjord
loss due to condensation
marine noise
medical embryology
Melastoma intermedium
membranosomas
Michigan Regional Network
microwave relay unit
minimum oil film thickness
Mirnyy
Missouri Compromises
mobile payments service
mono-articular arthritis
moonrunes
muscular ventricular septal defect
no-delay gate
nonintravenous
normal-reverse transfer
occurring to
OFN
ohashi
Ovtsyna, Proliv
oxydoreduction reaction
pearl-divers
pedunculus thalami basialis
pelagic fishing
Phoenix Lance process
please excuse my dear Aunt Sally
premature labour
Ptinus villiger
regular polynomial matrix
scintillating phosphor
separate filling lines from deck
Sport First
star-like
structurise
styill
superpurgation
tabes dorsalis
terpine
thiophene carboxylic acid
thyroid lesion
Tilia japonica
Tracy, Spencer
tsugs
tufthunters
usucapion
Uvaria grandiflora
vas accessorium
vellus hair
vervetmonkey
vlo
walk the streets
wave-sailing
xalsonte
your smile
Z-metal