生物防治法

For nearly 130 years, the worlds scientists have used a singular small, metal cylinder to define the exact weight of a kilogram. But that is about to change. The cylinder was made in 1889 of platinum and iridium metals. It is called the Grand K. The

发表于:2018-12-08 / 阅读(55) / 评论(0) 分类 2018年VOA慢速英语(十一)月

By Carol Pearson Washington 28 February 2007 watch Antibiotic Resistance report Penicillin and Erythromycin are examples of antibiotics that used to be one-time miracle cures. These drugs and other antibiotics are now less effective because bacteria

发表于:2018-12-16 / 阅读(83) / 评论(0) 分类 2007年VOA标准英语(二月)

STEVE INSKEEP, HOST: This year Americans will spend more than $2 billion on probiotics, supplements aimed at boosting what are called good bacteria inside us. One part of the market that's growing rapidly is probiotics for babies and kids. Here's NPR

发表于:2018-12-17 / 阅读(57) / 评论(0) 分类 2018年NPR美国国家公共电台5月

[ti:] [ar:] [al:] [by:] [00:01.19] Love Without Measure 无条件的爱 [00:05.89]Freda Bright says,Only in opera do people die of love. [00:11.69]Its true. You really cant love somebody to death. [00:16.17]Ive known people to die from no love, [00:1

发表于:2018-12-26 / 阅读(83) / 评论(0) 分类 温馨夜读

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 arm [ B:m ] He received a call to arms

发表于:2018-12-30 / 阅读(102) / 评论(0) 分类 每日攻克5词

说一口流利的英语,从简单的单词开始。 听听,读读,背背,今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 measure [ 5meVE ] Please measure me fo

发表于:2018-12-30 / 阅读(137) / 评论(0) 分类 每日攻克5词

Love without measure Freda Bright says,Only in opera do people die for love. It's true. You really can't love somebody to death. I've known people to die from no love, but I've never known anyone to be loved to death. We just can't love one another e

发表于:2019-01-02 / 阅读(52) / 评论(0) 分类 每天一点英文

Rainforests exist because it rains a lot and that makes the forests grow, right? Well, not so fast. What if its not the rain that makes the forestswhat if its the forests that actually generate the rain? Thats the contention of a paper in BioScience

发表于:2019-01-02 / 阅读(131) / 评论(0) 分类 60秒科学

Each year, millions of students complete their study programs at the colleges and universities across the United States. The new graduates receive an official piece of paper from their schools. This paper is known as their degree. It states what kind

发表于:2019-01-02 / 阅读(128) / 评论(0) 分类 2017年VOA慢速英语(四)月

Rainforests exist because it rains a lot and that makes forests grow, right? Well, not so fast. What if its not the rain that makes the forests? What if its the forests that actually generate the rain? That is the contention of a paper in BioScience

发表于:2019-01-08 / 阅读(90) / 评论(0) 分类 Scientific American(五)月

ROBERT SIEGEL, HOST: Now some good news, especially for babies around the world. Scientists in the U.S. and India have found an inexpensive treatment for a common infection. It could save hundreds of thousands of newborns each year. The treatment com

发表于:2019-01-16 / 阅读(92) / 评论(0) 分类 2017年NPR美国国家公共电台8月

RACHEL MARTIN, HOST: Go online, walk through any health store or supermarket, and you'll find all kinds of products being sold as probiotics. They're being promoted for all kinds of things - preventing upset stomachs, boosting the immune system, figh

发表于:2019-01-16 / 阅读(63) / 评论(0) 分类 2017年NPR美国国家公共电台12月

The title of today's lesson is You Cant Improve What you Dont Measure 今天的话题是有评价才有提高。 The old adage Measure twice and cut once is practical advice for everyone, especially carpet layers, tailors, and carpenters. 老话说得好

发表于:2019-01-18 / 阅读(88) / 评论(0) 分类 生活英语听力文章

Grammar Girl here. Today's topic is units of measurethose words and symbols that come after numbers. This first point might seem self-evident: you put a space between the number and the unit of measure. Even though it seems obvious, I'm telling you b

发表于:2019-01-30 / 阅读(77) / 评论(0) 分类 英语语法 Grammar Girl

By Deborah Tate Washington 20 September 2007 Legislation to regulate U.S. troop deployment cycles in Iraq was blocked in the U.S. Senate late Wednesday by Republican opponents who argued the measure could undermine the war effort. The action was a bl

发表于:2019-01-31 / 阅读(101) / 评论(0) 分类 2007年VOA标准英语(九月)

Probiotic yoghurt drinks and supplements dont live up to their promises, according to an EU watchdog. They claim to boost your immune system and help digestion. It concluded there is no scientific proof that products such as Yakult have any health be

发表于:2019-02-04 / 阅读(58) / 评论(0) 分类 阅读空间

WASHINGTON, March 19 (Xinhua) -- U.S. Senate Majority Leader Harry Reid said Tuesday he would not include a renewal of the federal assault weapons ban in a package of gun reform legislation to be introduced in the Senate, which signals the measure st

发表于:2019-02-08 / 阅读(126) / 评论(0) 分类 英语新闻

By Dan Robinson Capitol Hill 14 November 2007 On Capitol Hill, another fierce debate is underway about the war in Iraq, as the Democratic-controlled House of Representatives considers a measure to provide $50 billion in short-term funding for U.S. mi

发表于:2019-02-11 / 阅读(206) / 评论(0) 分类 VOA常速英语2007年(十一月)

4 Ways to Measure Your Standard of Living Standard of living should not equate to amount of spending. When I sat down to write an article on the countries with the highest standard of living, I thought it would be easy. But, how do you define standar

发表于:2019-02-18 / 阅读(123) / 评论(0) 分类 阅读空间

By Dan Robinson Capitol Hill 14 March 2008 The U.S. House of Representatives has approved a Democrat-crafted foreign intelligence surveillance law that contains provisions strongly opposed by President Bush. VOA's Dan Robinson reports from Capitol Hi

发表于:2019-02-20 / 阅读(156) / 评论(0) 分类 VOA标准英语2008年(三月)
学英语单词
aethylis
aluminium phenate
angular forceps
anterior wing
asymmetrical breasts
benzoylecgonine
better luck next time
blags
blow can
Blumea balsamifera
body polarization
borderline lepromatous leprosy
braces up
brickwoods
capitative
caste mark
Chacapalpa
charity principle
closed convex curve
Comptonia
copy edit
cosroes
couveuse
crevices
deligent
dermatodothis euonymi
digital fossae
ecoresponsive
eddered
Edy current test
electron-dense body
end point detector
fairway buoy engineering vessel
ferry dock
Ficus ruficaulis
fizzlings
flutes
grammatical category
guard personnel
half-chromatid
hasard
have bigger fish to fry
high speed simulation
hitting the fan
Kljakite
lighting source
looking-glass ore
medullary fold
mincid
mordant in dyeing
motherlode
multichannel discriminator
multiple microprocessor programming technique
multiple-layer inversion
non - english major
oblique marks
omnibused
output only mode
paired preference test
phoebastria nigripes
physical science
pilangiocarpy
pituitarium
principle of symmetry
Ptolemy's theorem
public indecency
pulmonary hepatization
radio polarimeter
refrigeration systems
rigid plastic foam
rooser
rotary tubular conveyor
sell her
sexual hyperesthesia
shock resistant
shock-simulating machine
single bar fabric
single map
sizzly
slide bridge
slow neutron reactor
somnolentia
spectral hole burning
spiralist
split extension of groups
standard PAL
supervisor configuration table
switch knives
symbolic tools
tough break
toy manchester terriers
transmission decay
transvestites
traversing speed
uncardinal
uprightnesses
valve discharge centrifuge
war stories
web design
wood-cutting
wych-alder
zone segregation