un. 水层阻力

CHAPTER ONE [00:44.25]READING [00:45.74]Page 2 and 3 [00:48.43]THE YOUNG GREEN CONSUMER GUIDE [00:51.51]Review by Tony Ma [00:54.62]This book says that our world is in danger [00:59.32]It is vital that we do something to save the earth [01:04.21]Firs

发表于:2018-12-01 / 阅读(435) / 评论(0) 分类 上海牛津初中英语九年级

In 2008 astronomers discovered surprising amounts of water molecules where planets were forming near young stars. But how, they wondered, could those molecules survive? They should have been destroyed by ultraviolet radiation. In theory, planetary du

发表于:2018-12-02 / 阅读(115) / 评论(0) 分类 Scientific American(十二)月

EXPLORATIONS - Blue Holes: Some of the Least Explored Areas on Earth BARBARA KLEIN: Im Barbara Klein. STEVE EMBER: And Im Steve Ember with EXPLORATIONS in VOA Special English. A blue hole is a flooded sea cave with a hole that opens up at the lands s

发表于:2018-12-07 / 阅读(100) / 评论(0) 分类 2011年VOA慢速英语(十一)月

Lesson 91 Milk And Its Uses 第91课 牛奶及用途 Every child likes to drink new milk. 每个孩子都喜欢喝鲜牛奶。 How pleasant it smells and how sweet it tastes! 那香浓的味道, 甜美的滋味是多么诱人! Do you not want to kn

发表于:2018-12-18 / 阅读(59) / 评论(0) 分类 英国学生科学读本

联合国环境规划署将每年的6月5日确定为世界环境日,希望通过世界环境日主题让人类认识到可持续发展和公平发展的重要性,最终使全人类拥有一个安全而繁荣的未来。 2006年世界环境日庆典

发表于:2018-12-18 / 阅读(77) / 评论(0) 分类 英文语法词汇

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Take a fire antdon't forget your gloves. Toss it in water, and it'll eventually drown. But throw a group of fire ants into the water, come back the nex

发表于:2018-12-24 / 阅读(68) / 评论(0) 分类 Scientific American(四)月

Unit 108:Get into the swim 第108单元:游泳去 One of the best all-around exercises,swimming increases both cardiovascular and muscle strength. 游泳能促进心血管及肌肉的耐力,是最佳的全身运动之一。 There is hardly any

发表于:2018-12-26 / 阅读(67) / 评论(0) 分类 减肥瘦身英语口语话题

The divers started in the ocean, but they are now within solid bedrock, 150 feet beneath someone's living room. They are now swimming in the water supply for the town above. Here they find, as they had hoped, life in the pitch darkness. These are hyd

发表于:2018-12-26 / 阅读(75) / 评论(0) 分类 自然百科2009年

If you've been outside before a rainfall in the spring, you might have noticed a particularly fresh or sweet smell that seeps into the air a few minutes before the first drops begin to fall. If you're familiar with this smell, it's a great way to pre

发表于:2018-12-27 / 阅读(64) / 评论(0) 分类 英语时差8,16

Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? 有件事情我们总觉得理所当然:室温下把一些冰块放入水中,

发表于:2018-12-28 / 阅读(93) / 评论(0) 分类 初学者听力文摘精选

Water Blankets Forming Planets A study in the journal Science finds much more molecular water in regions where planets are forming around young stars. The mechanism to keep the water from being destroyed by UV radiation appears to involve some of the

发表于:2019-01-02 / 阅读(163) / 评论(0) 分类 60秒科学

This is Scientific American's 60 seconds science. I'm Kellen Horgon. This will just take a minute. Have you ever wondered what happens to mosquitos in the rain, a raindrop is like 15 times heavier than those little suckers. So getting hit by one, he'

发表于:2019-01-08 / 阅读(106) / 评论(0) 分类 Scientific American(六)月

AGRICULTURE REPORT – October 29, 2002: Pest Management By Gary Garriott This is the VOA Special English Agriculture Report. Since nineteen-forty-five, farmers have used pesticides, poisons made from

发表于:2019-01-11 / 阅读(94) / 评论(0) 分类 农业与发展

BARBARA KLEIN: Im Barbara Klein. STEVE EMBER: And Im Steve Ember with EXPLORATIONS in VOA Special English. A blue hole is a flooded sea cave with a hole that opens up at the lands surface. These cave systems form in carbonate rock, often on islands.

发表于:2019-01-12 / 阅读(113) / 评论(0) 分类 2010年VOA慢速英语(十一)月

Whales, seals and walruses stay warm in chilly water because they have a thick layer of blubber. We humans rely on something like blubberneoprene rubber wet suitsto spend time in cold water. But the thick versions for really icy water are heavy and u

发表于:2019-01-17 / 阅读(113) / 评论(0) 分类 2016年Scientific American(十)月

Don: Yael, I'm going to take some vacation time so I can visit Chicago before it sinks and disappears. I mean, I'd like to see the Sears Tower and eat some deep-dish pizza before it goes. Yael: Relax, Don. Although Chicago is sinking, we're only talk

发表于:2019-01-22 / 阅读(111) / 评论(0) 分类 英语时差8,16

Everyone who has eaten instant noodles before knows how it looks like. It is very easy to cook it instantly by putting the noodles into the boiling water and add in those MSG packets, together with your other ingredients like eggs or vegetables. Howe

发表于:2019-02-05 / 阅读(112) / 评论(0) 分类 阅读空间

GIRL:Wow.You seriously spend a lot of time alone. BOY:What?So heres how it works.Water goes in the top,and food comes out the bottom. GIRL:When you shot it into the stratosphere( ['strtə,sfɪə]同温层) you figure it would induce( [ɪn'djuː

发表于:2019-02-23 / 阅读(64) / 评论(0) 分类 跟着美剧练发音

Voice 1 Thank you for joining us for todays Spotlight. Im Joshua Leo. Voice 2 And Im David Bast. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 In the ea

发表于:2019-03-04 / 阅读(108) / 评论(0) 分类 环球英语 Spotlight

Heres How..In a lake, cold water sinks to the bottom, forming a distinct layer underneath the warmer water on top. Wind blows across the top layer. This causes more of that warm layer to build up on one end of the lake, pushing the cold layer underne

发表于:2019-03-06 / 阅读(149) / 评论(0) 分类 英语时差8,16
学英语单词
a terrible business
activted molecule
advection inversion
adversum
aetite
alloy plating
Almstedt
alternating dominance
amn,Amn
anal crossvein
anertan
assertative
avalanche preventing forest
babblative
baking boards
Berezayka
Besredka's antivirus
bestreak
bovine heart
breakdown process
bug-chasers
cancellaria habei
cardinal extremity
cartelizations
Chaplanovo
circutous air attack
compound geometric lag scheme
concanavalin b
confervoid algaes
container gardening
Container Standardization
coronary catheter
cutaneious
cymatosira lorenziana
dechorionized
dollaghan
drinking-party
Ecumenical Patriarchate of Constantinople
electric induction coil
electrolaryngology
elevator surfing
enmix
equivalent form of value
fat-splitting
fog quenching
Fonteyn
forage cutter
forjudgement
frenched steak
furor transitorius
gas separating
genus ajugas
get a feel for something
glassy meteorite
grain conduction
guardaba
heavy current disconnecting switches
hesperis trichosepala turcz.
hydronic heating system
interacting control algorithm
interruptible service
judicable
latitude knee
lifted functor
long-range data
machine zero
made your way
make a goose of
Moorish arch
multi-use maintenance truck
north winds
obstinancies
odhams
one-man band
Oxyosphrasia
paradigmatic opposition
paysan
phase compensated cable
Phineas Taylor Barnum
pinned joint
piriformectomy
plexus ileocolic
precision inline tube
processes for synthetic ammonia
push-pull jack
quietdown
random-coefficient
residual speed
St George R.
subitoes
tea tree
tea-makings
tetrachoric correlations
tightness test of air box
titmouses
tool ticket
translation glide
turret gun mount
unprofessionalized
vertical height
visceral leishmaniases
Walshausen