光度滴定计

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. This will just take a minute. Youve probably chased a fly or two around the house this summer. And, chances are, it took a few swings before you brought down the buzzing nuisance.

发表于:2018-12-02 / 阅读(155) / 评论(0) 分类 Scientific American(八)月

This is the VOA Special English Health Report. Every few years, two groups do a study of how many Americans wash their hands after using the toilet. These groups are the American Society for Microbiology and the American Cleaning Institute, formerly

发表于:2018-12-07 / 阅读(112) / 评论(0) 分类 2010年VOA慢速英语(九)月

[全屏观看] 点击右键- 另存为 可保存这个Flash影片

发表于:2018-12-12 / 阅读(171) / 评论(0) 分类 北美小学生英语一年级教材(牛津英语教材)

第26期:Something Wrong with the Meter Y:What's the fare,please? Y:请问车费是多少呢? X:Twenty dollars and sixty cents. X:20.60美元。 Y:What?You're overcharging me! Y:什么?你一定多收我的钱了! X:No way.Look.That's what the mete

发表于:2018-12-26 / 阅读(143) / 评论(0) 分类 出国旅游口语一本通

World Hepatitis Day is observed on May the 19th. It aims to increase awareness worldwide of the diseases hepatitis B and hepatitis C. Its hope is to encourage the prevention and diagnosis of these two diseases, and increase the number of people who r

发表于:2018-12-29 / 阅读(114) / 评论(0) 分类 英语课程学习计划和讲义

今天我们要学的词是tit-for-tat. Tit-for-tat意思是针锋相对,以牙还牙。Islamist militants' attacks and tit-for-tat violence between rival ethnic groups have cast doubt on Mali's upcoming elections. 伊斯兰国激进分子的袭击和

发表于:2018-12-30 / 阅读(101) / 评论(0) 分类 英语单词荟萃

By Jessica Berman The U.S. space agency has released the first close-up pictures of Titan, Saturn's secretive, giant moon. Photos from the international Cassini spacecraft show the orbiting object shr

发表于:2019-01-03 / 阅读(117) / 评论(0) 分类 VOA2004(下)--健康科技

Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol

发表于:2019-01-08 / 阅读(123) / 评论(0) 分类 Scientific American(八)月

The U.S. Special Inspector General for Iraq Reconstruction has criticized the State Department for its management of nearly $3 billion in contracts and grants in Iraq. In two reports, auditors cited weak and ineffective State Department oversight of

发表于:2019-01-13 / 阅读(207) / 评论(0) 分类 VOA标准英语2010年(一月)

The US government is considering, for the first time, the approval of a genetically-modified animal for human consumption. The animal being considered is salmon, but approval could open the door for other animals as well. Those who favor the move say

发表于:2019-01-13 / 阅读(161) / 评论(0) 分类 VOA标准英语2010年(七)月

Stomach cancer is one of the deadliest diseases, and ranks second among cancers worldwide with at least 800,000 deaths yearly. But in the United States, the number of cases has been declining, except for among one group of Americans. Glenda Reimer, h

发表于:2019-01-13 / 阅读(127) / 评论(0) 分类 VOA标准英语2010年(五)月

At Scripps Research Institute in Jupiter, Florida, scientists are working to find clues about how the human brain processes memories. Their laboratory test animal is not a chimp or a dog or a rat animals that we know can remember things it is the com

发表于:2019-01-13 / 阅读(162) / 评论(0) 分类 VOA标准英语2010年(三月)

英语新词:这些meter后缀单词 你理解对了么? anemometer n. 风力计,[气象] 风速计。 audiometer n. [耳鼻喉] 听度计,听力表;测听计;音响测定器。 barometer n. [气象] 气压计;晴雨表;显示变化的事物

发表于:2019-01-14 / 阅读(160) / 评论(0) 分类 英文语法词汇

This is the VOA Special English Development Report. Health experts predict that soon, more people will die from cancer than from AIDS, tuberculosis and malaria combined. They expect that by two thousand ten, cancer will become the world's leading cau

发表于:2019-01-20 / 阅读(122) / 评论(0) 分类 2010年慢速英语(三)月

Glaucoma is the leading cause of irreversible loss of vision worldwide and now doctors believe the devastating disease begins in the brain and not in the eye as has long been thought. Dr. David Calkins, director of research at the Vanderbilt Eye Inst

发表于:2019-01-20 / 阅读(120) / 评论(0) 分类 VOA标准英语2010年(三月)

shows it really quite well. In order to bring back a piece of this mystery, his team of divers will be risking their lives. Diving problems, you got currents, tides, waves. We havent been here before. We haven't been this deep, though. One of those c

发表于:2019-01-22 / 阅读(114) / 评论(0) 分类 自然百科2011年

Tit for Tat针锋相对An American lady traveling in England some years ago, got into an compartment of a smoking carriage where an Englishman was smoking a pipe. For a short time she sat quietly expecting that the Englishman would stop smoking. But

发表于:2019-01-28 / 阅读(140) / 评论(0) 分类 英语小达人

72 约翰斯·霍普金斯疟疾协会 DATE=7-19-01 TITLE=SCIENCE REPORT - Johns Hopkins Malaria Institute BYLINE=Jill Moss (Start at 01'0

发表于:2019-01-30 / 阅读(176) / 评论(0) 分类 科技之光

今天我们要学的词是multitasking。 Multitasking, 原本是计算机术语,指多重任务同时处理,现在已经被沿用到日常生活中,指同时干很多事情。现在的美国中学生,一边写作业,一边听音乐,还要

发表于:2019-02-02 / 阅读(99) / 评论(0) 分类 英语单词荟萃

Offering Substitute 提供代用品 Specimen Letters1. Offering Rayon in Place of Watered Silk提供人造丝代替水洗丝Dear Sirs,Thank you for your fax of yesterday (April 3) with your order No.456 for 5,000 metres of 100cm wide watered silk. We

发表于:2019-02-05 / 阅读(183) / 评论(0) 分类 实用英语
学英语单词
abbreviated piece of nothing
Achynite
actual accuracy
adenosine'5-monophosphate
aluminum sheathed cable
anilic acid
ariht
atavistic regeneration
atom-smashing
bactrocera (zeugodacus) arisanica
benervit
Bouvier des Flandres
brake-valve
Bryan Coast
callomania
canoscan
cephalopholis urodeta
chlorine dioxides
cholesteryl liquid crystal
common support equipment
comprisure
coolant outlet
dextro-compound
digital selective calling
ear-tickler
engebretson
epipysitis of proximal phalanx of hallux
euhymenia
event driven processes
exponential homomorphism
filling cyclone
ginger families
haemosaccharimeter
Hansa-Muhle soybean extractor
high speed reaction
home currency bills payable
hot clean criticality
ideates
increasing exchange power
inside info
inventory problem
Irish Republic
is of concern
jeromes
job category
Kamskatchan
Langley's granules
lentour
Lindernia mollis
low yielding tree
LRL
manifestolike
Mariologist
market crosses
megastigmatrienones
metastrobilus
Microlepiidites
mykroft
na'auao
original premium rate
outpeered
PDEGA
pegues
petticoad insulator
Polpaico
praetoriums
pressurewire
primary sponsor
procreation
protolysate
pulse voltage
recycled materials
Retardicans
route plan
rush families
sand-cast tube
schedule of terms and conditions
set partition
setting valve
sheep-farmings
single dipole
sodium hyponitrite
solid-state degassing process
sowing in strips
sparsedness
spirit of wood
spotty ore
spp
spray canal
sunk or swim
supersets
take alarm at
torpedo exercise head
total product
triple sleeve antenna
two-colour hologram
urgent alarm
videorams
waywardens
Wonju