[机] 大气中的氧气

CHAPTER TWO Reading POLLUTUO FIGHTERS [00:09.90]Judy is collecting some facts for a class project on pollution. [00:18.44]She is interviewing Doctor Ray,a scientist,about trees. [00:27.51]Judy:Why are you so interested in trees,Doctor Ray? [00:38.16]

发表于:2018-12-01 / 阅读(514) / 评论(0) 分类 上海牛津初中英语八年级

(woman) Thank you. It's great to see so many of you interested in this series on Survival in Outer Space. Please excuse the cameras - we're being videotaped for the local TV stations. Tonight I'm going to talk about the most basic aspect of survival

发表于:2018-12-05 / 阅读(145) / 评论(0) 分类 托福听力短文

Can Oxygen Be Toxic?氧气有毒吗? In order for us to live we must have oxygen, so how can it be bad for us? Today we explain how oxygen can be toxic. 氧气是我们生存所必需的,所以它怎么会对我们有害呢?今天我们来解释为

发表于:2018-12-28 / 阅读(176) / 评论(0) 分类 初学者听力文摘精选

Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t

发表于:2019-01-02 / 阅读(175) / 评论(0) 分类 火星生命

This is Scientific American's 60-second Science, I am Karen Hopkin. This'll just take a minute. Methane is a greenhouse gas that traps heat even better than carbon dioxide. It comes from a variety of sources, including fossil fuel production and even

发表于:2019-01-08 / 阅读(135) / 评论(0) 分类 Scientific American(七)月

This is Scientific American's Sixty-Second Science. I'm Christopher Intagliata. Got the minute? A couple million years ago, mammoths migrated north from Africa to colonize Eurasia. Sometime around then a massive ice age kicked inand it was stay warm

发表于:2019-01-08 / 阅读(153) / 评论(0) 分类 Scientific American(五)月

In the day of the dinosaur, insects had wingspans of nearly 2.5 feet. So why are today's bugs so puny? According to researchers at U.C. Santa Cruz, we may have birds and bats to thank. Their concludes appear in the Proceedings of the National Academy

发表于:2019-01-08 / 阅读(173) / 评论(0) 分类 Scientific American(六)月

UNIT 4 [00:03.08]Lessons 25~32 [00:08.05]Look into Science! [00:11.89]Lesson 25: [00:16.64]Keep the Candle Burning!Science is so interesting! [00:23.72]I'm sure you'll like this experiment! [00:28.68]When you do this experiment,you will learn somethi

发表于:2019-01-09 / 阅读(346) / 评论(0) 分类 河北加拿大版初中英语

[00:02.44]Unit 21 Human Biology Warm-up [00:07.39]Exercise 2 Listen and guess which parts of [00:11.04]the body of being described. [00:13.00]Which words help you to decide. [00:16.79]1 This organ weighs about a kilo [00:19.77]and is made up of two s

发表于:2019-01-10 / 阅读(440) / 评论(0) 分类 北师大版高中英语模块7(选修)

Lung 肺 How many lungs do we have? 我们有多少块肺呢? We have two lungs in our body. 我们有两块肺。 Lungs are protected by ribs. 肺由肋骨保护。 They are very big. They are about two times as large as one of our feet. 它们都很

发表于:2019-01-10 / 阅读(157) / 评论(0) 分类 与美国小学生一起学英文第4册

[00:00.00]Unit 29 [00:04.58]Task:teach a practical skill to others [00:08.49]2 b)Listen and check.Were you surprised [00:12.75]by any of the instructions? [00:17.13]The most common circumstances in which you [00:19.69]might have to resuscitate someon

发表于:2019-01-10 / 阅读(269) / 评论(0) 分类 北师大版高中英语模块10(选修)

Grab my hand take one step Come with me no regrets 'Coz we'll fly higher than what you can imagine When your heart is mine, anything can happen You're my baby I know you hear this song No need to worry about us You ain't doing nothing wrong Coz latel

发表于:2019-01-14 / 阅读(142) / 评论(0) 分类 节奏布鲁斯

ROBERT SIEGEL, HOST: Adam Frank usually has his head in the sky. He's an astrophysicist. It's an occupational hazard. Right now, though, he is dazzled by the universe of green right here on Earth. ADAM FRANK, BYLINE: Now that we're well past the star

发表于:2019-01-17 / 阅读(110) / 评论(0) 分类 2017年NPR美国国家公共电台6月

LULU GARCIA-NAVARRO, HOST: It's not every day that scientists announce a new season. But that's what ocean researchers just did on the west coast. They say waters off Oregon, Washington and California now have a whole season when the oxygen level on

发表于:2019-01-17 / 阅读(158) / 评论(0) 分类 2018年NPR美国国家公共电台10月

On June 3rd, a train loaded with highly volatile crude oil derailed just outside the small town of Mosier in Oregons Columbia River Valley. More than 40,000 gallons of crude spilled out of the train. Some burned away in a 14-hour long fire at the sce

发表于:2019-01-17 / 阅读(175) / 评论(0) 分类 2016年Scientific American(十)月

凭借在iTunes和MySpace的成功,来自美国加州的流行女歌手科尔比凯拉特(Colbie Caillat)的处女专辑《Coco》一经发行便得到了很多歌迷的关注。在美国上市第一周,这张《Coco》共售出5万1千张,在本周的Billboard 200专辑榜中跻身前五名. 在没有与唱片公司签订合约之前

发表于:2019-01-23 / 阅读(259) / 评论(0) 分类 音乐咖啡厅

Colbie Caillat-Oxygen I came apart inside a world 我在这个由怒气冲冲的人们组成的 made of angry people 世界里支离破碎 I found a boy who had a dream 直到有一天我遇见一个寻梦的男孩 Making everyone smile 他令他身边

发表于:2019-02-02 / 阅读(115) / 评论(0) 分类 好听的英文歌曲

Oxygen therapy can bring drug-free relief to many Vidushi Sinha | Washington, DC 15 December 2009 A new study shows that breathing pure oxygen can considerably lessen the agony experienced with severe headaches Cluster headaches are described by suff

发表于:2019-02-06 / 阅读(237) / 评论(0) 分类 VOA标准英语2009年(十二月)

New research suggests agriculture has greatly increased the amount of dust blowing off of West Africa, the world's largest source of atmospheric dust, and may have been one factor driving the decrease in rainfall in the region over the past several c

发表于:2019-02-07 / 阅读(211) / 评论(0) 分类 VOA标准英语2010年(七)月

I came apart inside a world 我在这个由怒气冲冲的人们组成的 made of angry people 世界里支离破碎 I found a boy who had a dream 直到有一天我遇见一个寻梦的男孩 Making everyone smile 他令他身边的每个人都能展颜

发表于:2019-02-20 / 阅读(149) / 评论(0) 分类 好听的英文歌曲
学英语单词
5-hydroxylmethyluracil
accredited journalist
Acta Apostolicae sedis
actio spolii
aleichemshalom
Amyda sinensis
arteria facialis
bamboo rats
between center
butterfly-type frame
calibration current of reference ballast
canicular
carbonex
Cauderan
Charles Wheatstone
Chautauqua
colorscripts
costing exercise
cow-parsleys
crank rubber cover
double drum winch
Ellidshφj
employee's bonus
enthalpy gain
expansion curvature
finishing superheater
foundation wall
fracture line theorem
glomus fragilis
Gonda Libah
gwenyth
hair-raiser
hand inertial starter
handbook
hetacillin
hunting stage
IGMOSFET (isolated gate MOS field effect transistor)
IP video surveillance
kitchen help
lacrific
line sequence
live fish hold
LMFO
lock-picks
lower competitive price
Lφgumkloster
maculosine
malpracticed
marshalling plan
maximum overall width in service
maxwell boltzmann distribution
meteorological satellite ground station
microcalthrops
midmorning prayer
midship lind
mineral processings
model-making
nauseatic
navadas
nik shahr(geh)
nivafion
Nivankyul
no header row
non-dispersive X-ray fluorescence
nonoccurence
odd perfect number
one-dimensional character
Or what?
ordinary elliptic curve
othat
packet telephony
permanent mould casting machine
pneumonic tropica
polyether polyol
presalt(ing)
pressuremeters
Priozërnoye
pryings
rack friven planer
radial double mechanical seal
rainbow glass
rimming walls
rotary retort furnace
sensory image
shared electron
sheela-na-gig
split-field photometry
straight rolling
superfits
Teletel
television repeater
the young generation
threespace
thyratron stroboscope
transportable breakwater
trog
tushanensis
tzand
ventricular pacemaking
vernicles
Winlogon
zeugite