土壤气态水

Broadcast: August 4, 2003 This is Bill White with the VOA Special English Development Report. Safe drinking water has always been rare and valuable. Throughout the world, drinking water has to be stor

发表于:2018-11-27 / 阅读(685) / 评论(0) 分类 VOA2003(下)-发展与科学

If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the

发表于:2018-11-28 / 阅读(401) / 评论(0) 分类 新概念优美背诵短文50篇

Aqua Spacecraft 水资源监测太空船 NASA's latest and most ambitious weather satellite is measuring Earth's water cycle. Learn more about the Aqua satellite -- today on Earth and Sky. DB: I'm Deborah Byrd. JB: And I'm Joel Block for Earth and Sky. This

发表于:2018-12-07 / 阅读(169) / 评论(0) 分类 (科普英语)Earth and Sky

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.

发表于:2018-12-07 / 阅读(176) / 评论(0) 分类 火星生命

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(221) / 评论(0) 分类 60秒科学

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(182) / 评论(0) 分类 Scientific American(五)月

Cooking is one big science experiment and chefs have been gaining fame for more explicit uses of scentific techniques and tools in the kitchen. Now, according to an article in the December issue of physics world, mixologists the folks behind the bar

发表于:2019-01-08 / 阅读(175) / 评论(0) 分类 Scientific American(十二)月

The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic s

发表于:2019-01-08 / 阅读(189) / 评论(0) 分类 英语小短文

AGRICULTURE REPORT - Compost: an Organic Way to Better Soil and Crops By Gary Garriott Broadcast: Tuesday, July 05, 2005 I'm Gwen Outen with the VOA Special English Agriculture Report. Many farmers im

发表于:2019-01-30 / 阅读(252) / 评论(0) 分类 农业与发展

BEIJING, Jan. 2 (Xinhua) -- The first phase of the eastern route of China's south-north water diversion project is expected to be completed ahead of schedule, authorities said. With the main part of the first-stage construction to be finished in Marc

发表于:2019-02-03 / 阅读(172) / 评论(0) 分类 英语新闻

科学家估计,如果不减少二氧化碳排放,2100年地球平均气温将至少上升4摄氏度,到2200年会上升8摄氏度,无疑是地球灾难性的噩梦。 此前有科学家用气候模型分析称,全球气温将受二氧化碳排

发表于:2019-02-06 / 阅读(166) / 评论(0) 分类 阅读空间

BEIJING, Oct. 21 (Xinhuanet) -- A team of European researchers announced that they have found vast water vapor out of our solar system, according to a study in the U.S. journal Science Friday. Using Herschel Space Observatory, a European Space Agency

发表于:2019-02-09 / 阅读(186) / 评论(0) 分类 英语新闻

Man, born of woman, is of a few days, and full of trouble; 人从呱呱落地,只是短暂的几天,麻烦不断; He cometh forth as a flower, and is cut down; 他初如鲜花哪堪折; He fleeth also as a shadow, 像影子一样循去, And

发表于:2019-02-11 / 阅读(144) / 评论(0) 分类 美国语文第六册

What the Student Say in Science Classes 自然科学课上学生们都说了什么 The following quotations were gleaned from classroom discussions in 5th and 6th grade science classes. 下面的这些话都是从五六年级的自然科学课的课堂

发表于:2019-02-17 / 阅读(165) / 评论(0) 分类 英语小达人

LOS ANGELES, April 18 (Xinhua) -- Sugarcane(甘蔗) has the effect of cooling temperatures(温度) , thus playing role in stemming global warming, a new study has found. Sugarcane does so by reflecting sunlight back into space and by lowering the

发表于:2019-02-18 / 阅读(166) / 评论(0) 分类 英语新闻

1. The power is off. 停电了. 2. The power is back on. 电又回来了. 3. Please turn off the power. 请把电源关掉. 4. Throw the power on. 打开电源. 5. The power is running low. 快要没电了. 6. I was shocked. 我被电到了。 7. Is

发表于:2019-02-18 / 阅读(188) / 评论(0) 分类 英语口语

Toxin-loving Trees 树木能调节气候,保持生态平衡,树木通过光合作用,吸进二氧化碳,吐出氧气,使空气清洁,新鲜。一亩树林放出的氧气够65人呼吸一辈子。树还能防风固沙,涵养水土,吸收各种粉

发表于:2019-02-24 / 阅读(239) / 评论(0) 分类 英语听力文摘 English Digest

There are 320 million cubic miles of water on Earth and that is all we're ever going to get. 地球上有13亿立方公里水,这是全部。 The system is closed: practically speaking, nothing can be added or subtracted. 系统已经关闭,说得明

发表于:2019-02-25 / 阅读(169) / 评论(0) 分类 万物简史

The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic s

发表于:2019-02-25 / 阅读(224) / 评论(0) 分类 双语有声阅读

James Watt And The Teakettle A little Scotch boy was sitting in his grandmother's kit- chen. He was watching the red flames in the wide open fire- place and quietly wondering about the causes of things. In- deed, he was always wondering and always wa

发表于:2019-02-25 / 阅读(130) / 评论(0) 分类 双语有声阅读
学英语单词
albovittata
alkaline character
allium porum l.
bed river
benedito
bio-inspired
biotinylsulfone
Bischofsmais
blindism
blue temperature working
braniff
briser
capital issue committee
cement work
centrodiapophyseal
characteristics of lights
cinemania
clean-airs
comic-strip oriented image
commissura arcuata
commutated potentiometer servo
condictio sine causa
controuersy
counterattraction
cprt
crown and concavity
cyproheptidine
defense programs
dependently
deposit in currency cocktails
destacar
digital archives
drill-liker
dump from
dynamic provisioning
dyscrasic
electromagnetic data store
end ball
end framing
engrammatic
ephedraceaes
equal resistance brach circuit
fall zone
fencelessness
fibre-to-fibre contact
flat LEM
fungistasis
gomphrena
green rubber
head tubes
heptaline
heuristic solution
homoleptic complex
indenization
inust
laser oscillations
local reboot
macrotrace
Manderfield
map list
menschlike
migratory glossitis
morphological race
murray grey cattle
nonavid antibody
null matrix
oculentum hyoscinae
Old Spanish
operating piston
organic aciduria
outer addendum
outer inspection
physical storage address
pin-break shank
press someone to death
pressure exploration
professional conduct
radwan
recall by popular vote
removable denture
retarded field and retarded potential
right to rely on lack of conformity
rise pit
satellite system software
scan-agraver
scanning X-ray micro-analyzer
schtetl
seant
Sharīfah
sight glass with nozzle
skin tracking
snakestones
soil nitrification
stamp-duty
starting resistor
sulitjelmas
taking to be
upwind leg
variable stroke plunger pump
wartliker
willow oak
yellowcress