补氢

Rachel Lee: The housing market keeps losing steam. Sales of previously owned homes fell 5. 7% last month according to the National Association of Realtors. If you're looking for a house , the group's

发表于:2018-12-05 / 阅读(189) / 评论(0) 分类 商业报道2006年

SHALL WE CHOOSE DEATH?我们该选择死亡吗? I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of

发表于:2018-12-07 / 阅读(185) / 评论(0) 分类 世界上最伟大的演讲

The composition of the sun lies in this bar code. 这个条码说明了太阳的组成 All the thin lines are caused by tiny amounts of complex elements 这些细细的线条,都是微量复杂元素造成的 metals like iron and magnesium. 好比说

发表于:2018-12-07 / 阅读(237) / 评论(0) 分类 太阳科普

Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa

发表于:2018-12-07 / 阅读(225) / 评论(0) 分类 VOA2003(上)-科技导航

I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indians and Pakistanis

发表于:2018-12-12 / 阅读(189) / 评论(0) 分类 英语演讲

I couldn't get over this mess. The federal government is confirming what Joan Glickman of Pompano Beach, Florida suspected all along. Tainted drywall from China is giving off a harmful gas that's turning her air-conditioning wiring black, causing it

发表于:2018-12-20 / 阅读(183) / 评论(0) 分类 cnn2009年(十一)月

This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan

发表于:2019-01-04 / 阅读(224) / 评论(0) 分类 Scientific American(八)月

From VOA Learning English, this is the Health Lifestyle report. Garlic is one of the most common cooking ingredients around the world. Many dishes in Europe, Africa, Asia and the Americas use this strong-flavored vegetable. Garlic is similar to other

发表于:2019-01-12 / 阅读(243) / 评论(0) 分类 2016年VOA慢速英语(十二)月

BERLIN, April 25 (Xinhua) -- A study recently published in the journal Nature Chemical Biology opens up new avenues in biohydrogen research, the Technical University of Berlin (TU Berlin) said on Friday. Scientists at the TU Berlin succeeded in expla

发表于:2019-01-26 / 阅读(160) / 评论(0) 分类 英语新闻

Scripts: The first official drive of a hydrogen fuel cell car in china. G.M boss Rick Wagoner telling CNN his company's ultimate financial viability depends on taking a lead in alternative fuel technology. I wouldnt want to try to be the, the you kn

发表于:2019-01-26 / 阅读(167) / 评论(0) 分类 商业报道2007年

NEW YORK Plug in your car, then unplug, and drive away. More and more consumers are doing just that. At the 2014 New York Auto Show many automakers unveiled electric or hybrid vehicle to address the growing global appetite for environment-friendly ca

发表于:2019-01-30 / 阅读(187) / 评论(0) 分类 英语新闻

SEOUL/WASHINGTONThe U.N. Security Council said Wednesday that it was working to craft new sanctions against North Korea after its latest nuclear test, while the United States and other world powers voiced skepticism about Pyongyang's claim that the u

发表于:2019-02-04 / 阅读(147) / 评论(0) 分类 英语新闻

Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers have measur

发表于:2019-02-05 / 阅读(226) / 评论(0) 分类 托福英语

PREFIX 1.a-:of;on;intensive;negative,not,without;ad-;ab-. 2.ab-:away from,off. 3. ad-:to;at;for. 4. aer(o)- :relating to air . 5.al-:all. 6.ambi-:on both sides,around. 7.amphi-:on both sides,around. 8.an-:negative,not,without. 9.ana-:upon,up,on. 10.a

发表于:2019-02-06 / 阅读(226) / 评论(0) 分类 雅思英语

December 30, 1954 I am speaking not as a Briton, not as a European, not as a member of a western democracy, but as a human being, a member of the species Man, whose continued existence is in doubt. The world is full of conflicts: Jews and Arabs; Indi

发表于:2019-02-09 / 阅读(238) / 评论(0) 分类 英语美文

Tiny nanomaterials show promise in many efforts to reduce greenhouse gas emissions Rosanne Skirble | Washington, DC 03 December 2009 Sir Lankan village shop at dusk lit by solar panels - Nanotechnology could help make solar cells more accessible, eff

发表于:2019-02-12 / 阅读(152) / 评论(0) 分类 VOA标准英语2009年(十二月)

9月16日是墨西哥馆日,墨西哥馆五颜六色的风筝森林吸引了不少人的眼球,你知道小小的风筝里有什么大学问吗?其实风筝也有很多种分类哦,一起来看看吧。 说到kite这个单词,这也许是我们

发表于:2019-02-18 / 阅读(248) / 评论(0) 分类 英语口语

North Korea conducted a 'successful' hydrogen bomb test, Pyongyang has confirmed. The thermonuclear weapon triggered a massive 5.1 magnitude earthquake when it exploded at 10am local time on Wednesday. 平壤方面已经证实,朝鲜成功的进行了

发表于:2019-02-18 / 阅读(167) / 评论(0) 分类 英语新闻

So my name is Taylor Wilson. I am 17 years old and I am a nuclear physicist, which may be a little hard to believe, but I am. 我叫泰勒 威尔逊,今年17岁,我是一名核物理学家,可能你们很难相信,但我确实是。 And I wou

发表于:2019-02-21 / 阅读(166) / 评论(0) 分类 TED演讲教育篇

Almost nothing about it can be used to make reliable predictions about the properties of other liquids and vice versa. 它的身上几乎没有哪一点可以用来对别的液体的性质进行可靠的推测,反之亦然。 If you knew nothing of

发表于:2019-02-25 / 阅读(175) / 评论(0) 分类 万物简史
学英语单词
4-etllyl-2-picoline
Aarle
acid bronze alloy
attorneys-at-law
azimuth wander angle
bluewings
bone-seeking isotope
breakwater core
camera with ground glass focusing
candlewick
cataracta complicata
celeron
clock marker track
cold engine starting test
computer-aided learning model
crab-like
ctoss-fire technique
despatch delay
dicranum flagellare
diesel hammer pile driving frame
Disporopsis pernyi
dyeing rate
ease of ignition
exabit
experimental installation
fastraxes
fitting straight line
functional foreman
global structural resonance
Gusinoozersk
Hall element
heliotherapeutic
high background contamination
honour clause
hormone poisoning
in ten
infineon
klinsky
land-flood
logarithmic acoustic impedance
low-voc
LPRP
lyophil preservation
macroporous
magnetic-tooth transducer
magnetometric titration
market research
MCIA
meridian of cornea
Mitatib
motorist
mylontization
Nonalbuminuric
nondeserted
nonhormones
observable information
one-sided love
Ophiorrhiza filibracteolata
outgoing feeder
pertinently
Pertofrane
plutonate
pressure water cooled reactor
pseudodendrothrips mori
Rapperswil
raw material sites
red-backed squirrel monkey
regiocontrolled
rensburg
Resplen
Return to Zero
sanagapocken
sempervirens
servantage
shambolically
soces
sodium acid arseniate
sorbitise
spring-trip shank
stat padders
stern tube packing gland
Tassa Takorat
thelcticopis severa
thundereggs
timber cofferdam
tonation
tragicomically
transfer crane gate type
unacidified
ununtriums
us property
vortex bursting
West Wellow
west-east
window type current transformer
Yangsin
yerushalaim
yo-hah
yoichiro
yuckier
zirconium(iv) fluoride
zu chong-zhi