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(566) / 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(305) / 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(113) / 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(107) / 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(159) / 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(122) / 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(107) / 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(105) / 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(180) / 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(102) / 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(80) / 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(120) / 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(88) / 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(111) / 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(103) / 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(129) / 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(183) / 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(112) / 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(169) / 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(87) / 评论(0) 分类 双语有声阅读
学英语单词
Admiralty Board
aemu
Alstonia mairei
arteriolar-venular
artificial ecosystem
basal dash
bedstocks
benzene-pentacarboxylic acid
brodel
calibration-service specification
carboloy composition resistor
classification manual
climofunction
closed flight plan
comfort noise generator
competency-based
condition to
coumbassa
cyclodomus yuccae
cylindrical cutting unit
Darmian
data class
decadienoic acid
door close switch
drain hose
drapeable
dums
earth meshing
Electric Actuators
electromagnetic apparatus
Filippoi
focalisolation
football shirt
fouracres
frisco mt.
fuel handling accident
germ middling
ginger-nut
Gioia del Colle
glycerate-3-phosphate
high voltage arc
histochemistry
Histopatological
hot oil distillation
hypotenusal allowance
information underload
initial down payment
isolysergic acid
jump-start
kingdoms of lesotho
lateral deposit
livre tournois
low income group
luster mottling
make it their business
man-about-town
monovariant system
Msowero
murray loop test
mycosphaerella areola ehrilich et wolf
net-zero
nose wheel steering control cable
Ordos Plateau
orthorpantomography
outfinessing
peepshows
piscicle
police bureau
predecision
puls e-width modulation
puncheoned
railway charges
ramsauer townsend effect
readable area
Resseta
rhabdocoela
ribbon clay
river meandering
SCNA
second stage altitude
semi integral plow
service clubs
shaft contact
silicide dye
site electrical facilities
site of customs inspection
small-college
Solonian
squid angling machine
supercalendered cover paper
Tamazula
tubular staying
twenty-firsts
umlauts
unaffranchized
underloved
ungradable opposition
vasilar
wages sheet
wedge groove
work in relays
X-band radar beacon