硝基去氧纤维素

Don: Time to go again to the A Moment of Science mailbag. Yal: A listener writes: Dear A Moment of Science, Scientists know that one day we'll run out of oil and other natural sources of energy. Beyond solar power and wind power and ethanol, what are

发表于:2018-12-27 / 阅读(131) / 评论(0) 分类 英语时差8,16

86 去痛片须慎用 DATE=8-16-01 TITLE=SCIENCE REPORT - OxyContin Warning BYLINE=Jerilyn Watson (Start at 1'02

发表于:2019-01-02 / 阅读(164) / 评论(0) 分类 科技之光

分集介绍:导数,商数,正弦和余弦 Derivatives.of.products.quotients.sine.cosine

发表于:2019-01-05 / 阅读(386) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

分集介绍:导数,斜率,速度与变化率 Derivatives.slope.velocity.rate.of.change

发表于:2019-01-05 / 阅读(384) / 评论(0) 分类 麻省理工学院公开课:单变量微积分

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This'll just take a minute. It sounds like something out of a bad science fiction novel. During World War II, a fungus called Tricoderma reesei ate its way through US military unifo

发表于:2019-01-08 / 阅读(160) / 评论(0) 分类 Scientific American(五)月

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏,它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标

发表于:2019-01-08 / 阅读(236) / 评论(0) 分类 英语对接游戏

Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl

发表于:2019-01-09 / 阅读(141) / 评论(0) 分类 VOA标准英语2011年(四月)

Turning Cigarette Butts to Batteries 烟头转变成电池 If you see a person carelessly throw a cigarette to the ground, what are you likely to think? That depends. If you hate people throwing things on the ground, you might think, That person shou

发表于:2019-01-12 / 阅读(137) / 评论(0) 分类 2014年VOA慢速英语(九)月

Beginners. Well, it's time for a new dog. For the past year, we have been a one dog family. But, you know, our dog, Rosie, is a wildly social lady. She goes crazy any time she meets another dog, a cat, a mouse, or a bird, let alone a human. But, the

发表于:2019-01-28 / 阅读(130) / 评论(0) 分类 英语博客 A cup of English

HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure

发表于:2019-01-30 / 阅读(167) / 评论(0) 分类 健康与经济

By Melinda Smith Washington 14 May 2007 Top executives of the company that makes a powerful painkiller called Oxycontin admitted this week they lied about the drug's addictive qualities in order to boost sales. As VOA's Melinda Smith reports, worldwi

发表于:2019-02-03 / 阅读(184) / 评论(0) 分类 2007年VOA标准英语(五月)

Beginners. Today, Foxy had an appointment with the vet for vaccinations and a general check-up. She is about eight months old, so she needed her second set of vaccinations. The vet also needed to see if her growth was normal and healthy. I put her in

发表于:2019-02-07 / 阅读(160) / 评论(0) 分类 英语博客 A cup of English

Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

发表于:2019-02-19 / 阅读(134) / 评论(0) 分类 听播客学英语

台湾籍旅美老师今天交给我们的句子是: It's not rocket science: Focus on lean protein, healthy fats and non-processed, unrefined carbohydrates such as vegetables, beans, whole grains and fruit. 这不难懂:多摄取低脂肉类、健

发表于:2019-02-22 / 阅读(146) / 评论(0) 分类 留美老师带你每日说英文
学英语单词
adonizes
advenement
air pollution control
alentemol
aminopherases
anti-freezing mixture
bail jumper
Binh Phong Thanh
blunt-endeds
bung hole
butt joint with single strap
Cao Daism
central-levels
Champereia manillana
chiapensis
city father
cleark
comparative item
craniotosis
cross sill
currid
customs territory
definite time filtering
degraded alkali soil
department of water administration
discoidal nervuel
downsizer
dyslogistically
endothelial cushion
entamoebiasis hepatica
examination per vagina
family Cuculidae
fatigue crack initiation
fistucae
flow cavity
following at a distance
fragmentation warhead
freight manifest
genus aethionemas
get a good look at
Giat
googs
guerrilla marketing
high income
ink powder
international working men's association
interpolability
Jackson Center
lactose
lamp control
lift-top
linear congruence
machine cycle time
mattocks
maximum latency
membrane fouling
monolog
Mookoppe-gawa
Morningstar rating system
motorcycle side car
multiton
net biome productivity
Nidau
non-monetary assets
nuttier
off-line sorting
oil bruning boiler
polar transposition
post dormancy
preferred dimension
proper divisor
pulse-labeling
Ratisbon
reflecting condenser
Rychnowo
saline-alkaline soil
silver(ii) fluoride
spheric lens
stress-induced leakage current
suenens
thioformamide
Ti-plasmid
transducins
triangular slip road
turbine admission valve
tut-tutting
ultrastable subsystem
under the ascendancy of
underwater continental shelf
urogenital tract
Urucara
variable component
verruca mollusciformis
vestrymen
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wash drum
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whuther
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Zyklon-B