污染物源

.....green plants ultimately. When it first appeared therefore, it would have been seen as a poison, it would have been a pollutant. But gradually, through Darwinian natural selection, living organism

发表于:2018-12-07 / 阅读(162) / 评论(0) 分类 寻访外星人

Lesson 38 Water and the traveller 水和旅行者 First listen and then answer the following question. 听录音,然后回答以下问题。 What does this text describe? Contamination of water supplies is usually due to poor sanitation close to wat

发表于:2018-12-08 / 阅读(592) / 评论(0) 分类 新概念英语第四册

NANCY:That's it Klara.We hope you like it. KLARA:Wonderful.Thank you.I love what you've done. KLARA:Now there are a few things I've been thinking about. Some of my original ideas were not quite right.

发表于:2019-01-02 / 阅读(196) / 评论(0) 分类 捷进英语

Water Becoming More Precious Than Oil in Arab World 在阿拉伯水比油更珍贵 While one of the most pressing political and social issues facing the Arab world rarely makes headlines, it is an iss

发表于:2019-01-03 / 阅读(218) / 评论(0) 分类 VOA2005(上)--环境科学探索

Killing Mosquitoes Early On及早杀灭蚊虫预防疟疾 Targeting mosquitoes in their early stages of life has the potential to greatly boost malaria control efforts and prevent thousands of new infections every year. A new study looks at the effec

发表于:2019-01-03 / 阅读(150) / 评论(0) 分类 VOA常速英语2013年(九月)

英语文摘欣赏 Once there was a great Sufi saint. In his last days, someone asked him about his master. Saint said, Since you asked I will certainly tell you about three masters. 曾经有一位伟大的苏菲派(伊斯兰神秘主义派别的总

发表于:2019-01-03 / 阅读(157) / 评论(0) 分类 阅读空间

今天我们要学的词是source。 Source, 意思是来源。 Social Security is a reliable income source for seniors, 社会保障是美国老年人可靠的收入来源。 Police have received thousands of tips, according to a source close to the

发表于:2019-01-07 / 阅读(181) / 评论(0) 分类 英语每日一词

By Kari Barber Dakar 21 March 2008 In many African countries, few people have access to computers and the Internet. Experts say this is hindering development and preventing students from being able to compete for jobs. At a conference in Dakar this w

发表于:2019-01-07 / 阅读(211) / 评论(0) 分类 VOA标准英语2008年(三月)

The US Environmental Protection Agency lists stormwater as the primary cause of water pollution in the United States. Roads, shopping centers and housing developments are generally seen as enhancing a community's quality of life. But they can also di

发表于:2019-01-07 / 阅读(149) / 评论(0) 分类 VOA标准英语2010年(八)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. Thisll just take a minute. Bisphenol A. Also called BPA, it's used to make shatter-proof plastic known as polycarbonate, found in everything from water bottles to medical devices to

发表于:2019-01-08 / 阅读(209) / 评论(0) 分类 Scientific American(五)月

While one of the most pressing political and social issues facing the Arab world rarely makes headlines, it is an issue that some political analysts believe could lead to the next great confrontation in the region. Rapidly expanding Arab populations

发表于:2019-01-08 / 阅读(239) / 评论(0) 分类 2005年NPR美国国家公共电台

Species Loss Compromises Earths Vital Systems Scientists have long thought that diverse ecosystems like forests, lakes and streams are especially good at removing pollutants that human activities put into the environment. A new study in the journal N

发表于:2019-01-14 / 阅读(127) / 评论(0) 分类 VOA标准英语2011年(四月)

Heres the surprise entry into search for life, this little moon that youd expect to be pretty dead and dull, and coming out of the South Pole of it is a jet of water ice, all the things you need for life are there. Theres an energy source, theres a w

发表于:2019-01-22 / 阅读(140) / 评论(0) 分类 自然百科2012年

Nature reports results from GRACE, a satellite machine designed to use gravity measurement to monitor the world's water resources. GRACE is the Gravity Recovery and Climate Experiment and it's a two-satellite machine. These two satellites are followi

发表于:2019-01-22 / 阅读(170) / 评论(0) 分类 自然百科2010年

Poverity is rife in Ethiopia. The United Nations ranks it amongst the poorest countries in the world. For many, the Nile is the source of hope and salvation. It was humbling to witness the strength of their belief. -Some people might think that worsh

发表于:2019-01-22 / 阅读(159) / 评论(0) 分类 自然百科2015年

By Paul Sisco Washington 25 April 2008 A new type of swimsuit developed by Speedo is raising Olympic concerns and helping smash world records in Olympic trials.VOA's Paul Sisco has more. Speedo representatives say it is the most technologically advan

发表于:2019-01-31 / 阅读(149) / 评论(0) 分类 VOA常速英语2008年(四月)

Simple Questions Can Help Stop Killer Disease 制止致命疾病的简单方法 Diarrheal disease is one of the leading killers of young children in Africa. While more countries are using vaccines to help prevent outbreaks, health officials are often

发表于:2019-02-01 / 阅读(139) / 评论(0) 分类 VOA常速英语2013年(九月)

BEIJING, Feb. 2 (Xinhuanet) -- The source of cadmium contamination in the Liujiang River had been blocked and tap water in Liuzhou is safe to drink, said environmental officials of the Guangxi Zhuang autonomous region on Wednesday. Tap water from Liu

发表于:2019-02-03 / 阅读(174) / 评论(0) 分类 英语新闻

发表于:2019-02-04 / 阅读(153) / 评论(0) 分类 阅读空间

台湾籍旅美老师今天交给我们的句子是: Take a look at the water in this glass. Refreshing, hydrating, and invaluable to your survival. Before you take a sip, though, how do you know that the water inside is free from disease-causing o

发表于:2019-03-04 / 阅读(163) / 评论(0) 分类 留美老师带你每日说英文
学英语单词
a fair hearing
angular momentums
annual quota
armands
armstands
Blake, Edward
breast up to
bsri
bulk sale
Busone
by the hand
camelinus
Chelonopsis chekiangensis
clutch foot plate
consumption of main foodstuffs per head
crowns of Egypt
crystal master oscillator
dc coefficient
deadeners
definite time lag
derous
drawing fluid
electric-force gradient
end (up) in
end standard rod
facilitate diffusion
fallots
fast - moving consumer goods
floating car data
forestal
frequency-interleaved pattern
genus resedas
Gropeni
half-muffled
hyperarchy
industrial sewerage system
ionospheric scattering
JPA (job pack area)
kaffir lily
key lock feature
kinaesthesiometer
leafy spurges
London International Financial Futures and Options Exchange
lustering
machine-drawing
main performance
malaeosis
manual-tracking tachometer
marianne
matrix fibre
Menadol
merchant steamer
meshers
metallurgical property
mooring rope
multiple-beam torus atenna
muriacite
natural radiation environment
near-critical period
noiseless channel
non-ossifying fibroma
non-radical
open sb's eyes to
passenger facility
periodic vibration
periureteral
phase terminal
Phyllanthus oligospermus
placenta praevia marginalis
posterior cells
primitive cartilage
Primula alsophila
quilted plastic panel
redemption
remoulade sauce
rose wines
Rotary dial phone
ruth benedicts
RWC
Sagatal
sandbell
sash section
screen prints
send a delegation
single point mooring tower
SPUIs
starting track number
stocking density
tactical atomic target
take a letter
Tautoga onitis
telemetered air monitoring
themus (themus) formosanus
triploid(nemec 1910)
unhiding
video horizontal retrace
wedowee
wide-edged shoes
Wien inductance bridge
wyandots
yield to no remedy
zero range mark