氢氧切割器

Well, that's limelight. What exactly was it? Well it was the burning of calcium oxide in a very intense flame. And when did the job of a limelighter begin? Oh, famously, the first recorded instance in

发表于:2018-12-07 / 阅读(172) / 评论(0) 分类 圣诞特辑

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(209) / 评论(0) 分类 VOA2003(上)-科技导航

Item eight. Vocabulary. fossil, molecule, hydrogen, carbon, sulfur. Petroleum has been important since ancient times. In Latin, the name means rock oil. Petroleum is a fossil fuel. The liquid comes from the remains of plants and animals that died mil

发表于:2018-12-27 / 阅读(141) / 评论(0) 分类 step by step 3000 第一册

Matthew / England speaker I hope not. I hope if they are driving cars they are run on hydrogen or perhaps something else, electricity perhaps, but I really hope we don't use gasoline anymore. Maiko / Japan speaker I do think in 100 years people will

发表于:2018-12-28 / 阅读(156) / 评论(0) 分类 一起闲话英语-English Chitchat

图片1 aerial n.天线 例句:The picture is much clearer with the new aerial. 装上新天线后画面清晰多了。 nitrogen n.氮 例句:Air consists chiefly of nitrogen. 空气主要由氮气组成。 oxygen n.氧 例句:Trees relea

发表于:2018-12-30 / 阅读(154) / 评论(0) 分类 漫画搞定六级词汇(文本+音频)

One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water

发表于:2019-01-02 / 阅读(187) / 评论(0) 分类 60秒科学

Hyaluronic acid - the largest glycosaminoglycan known, it plays an important role of restricting the flow of water in tissues, particularly in synovial fluid where it acts as a lubricant.. Hydrogen bo

发表于:2019-01-03 / 阅读(151) / 评论(0) 分类 医务英语

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(217) / 评论(0) 分类 Scientific American(八)月

One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water

发表于:2019-01-08 / 阅读(218) / 评论(0) 分类 Scientific American(四)月

The Law Enforcement torch run for the 2007 Shanghai Special Olympics Summer Games has started across China. Beijing Mayor Wang Qishan was on hand to light up the flame at the Temple of Heaven. He then handed it to Law Enforcement torch bearers , ina

发表于:2019-01-11 / 阅读(186) / 评论(0) 分类 英语新闻视频

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(300) / 评论(0) 分类 音乐咖啡厅

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(150) / 评论(0) 分类 英语新闻

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(259) / 评论(0) 分类 农业与发展

The U.S. space agency is moving ahead with preparations for Thursday's scheduled launch of the space shuttle(航天飞机) Discovery on its mission to the International Space Station. NASA said it was loading liquid oxygen and liquid hydrogen into th

发表于:2019-02-02 / 阅读(174) / 评论(0) 分类 英语新闻

German Car Manufacturer Audi Creates Fuel From Air And Water 奥迪用空气和水合成新燃料 Creating an alternative green or carbon neutral fuel to replace gasoline has been the holy grail for scientists for many years. However, while there has

发表于:2019-02-05 / 阅读(169) / 评论(0) 分类 阅读空间

LONDON, May 10 (Xinhua) -- The London Organising Committee of the Olympic and Paralympic Games (LOCOG) has confirmed that the first torchbearer for the Olympic torch relay will be three-times Olympic gold medallist Ben Ainslie. Ainslie will start the

发表于:2019-02-05 / 阅读(199) / 评论(0) 分类 英语新闻

LONDON, April 11 (Xinhua) -- The Olympic Torch has passed rigorous testing to ensure even the worst of Britain's weather will not be able to put it out, the Evening Standard newspaper said Wednesday. Two prototypes withstood 50mph winds, extreme temp

发表于:2019-02-07 / 阅读(181) / 评论(0) 分类 英语新闻

The Olympic torch has climbed the tallest mountain in Wales carried by one of Britain's best-loved mountaineers. 奥运火炬已经到达了威尔士最高山,是由英国最受欢迎的登山运动员之一克里斯伯宁顿爵士传递的。 Sir

发表于:2019-02-08 / 阅读(252) / 评论(0) 分类 英语新闻视频

巧妙拒绝别人 Establish boundaries and honor them for all to see 设定让所有人都知晓的界限,并坚决执行 Let your constituents know your priorities and limits. Don't continually break your own rules about when you are available or

发表于:2019-02-16 / 阅读(135) / 评论(0) 分类 英语听力广播—Listening

Hydrogen and Industries Hydrogen,the lightest and simplest of the elements, has several properties that make it valuable for many industries. It releases more heat per unit of weight than any other fuel.In rocket engines, tons of hydrogen and oxygen

发表于:2019-02-17 / 阅读(147) / 评论(0) 分类 双语有声阅读
学英语单词
accidental deaths
adrenogenital symdrome
agcy.
all rise
amorphous semiconductor
antidazzle driving mirror
atlaritoaxial
Babilafuente
backside angle
big as life
boiler riveting machine
Bolama
br?nsted-lowry theory
cathode follower valve
centrifugal blast
chordwise distance
chowchow
clincher boarding
coarse porous concrete
combined strength
crystallographic component
current-time curve
customer's excuses
cyrtomium taiwanianum tagawa
defeasibilities
dexamfetamine
dextromethorphan hydrobromide
dincin
diopt(r)ometer
disclaimer of trustee
distributed weight
dulce, 'Domum!'
echinochromogen
egotisms
energy-dependent flux
exchange control authority
farther out
fattal
five animal exercises
footsores
fresh water formation
genus lithospermums
gmelia philippinensis cham.
heat exchanger tyype regenerator
host security module
hurricane track
ice plough
ikb
incomes policy
intuitionistic logic
jayhawker
jerry rig
kinnikinics
labour value
land policy
landing parties
laser optical bench
lichenans
life pack
liwei
magnetic-domain device
maloperation
maritime authorities
microcaliper log
mixed rearing infection
monchaunce
myery
open-cut development
papwort
parrich
parsing davit
permafrost table
polychotomous
postseasons
Pukhrāyān
quater dividing method
retes
safeguard provisions
salonikas
sand therapy
santalane
saussurian
seasoned salts
secular aberration
self-reading
sexual jouissance
silicate melt inclusion
stoppage of payment
submarme
Tengréla, Dép.
Tespe
text-oriented
thalimidine
the Spanish Inquisition
treasure-seekers
TV camera digitized divice
twine retainer
two-sample analysis
ungenerousness
valve packing
vane curvature
visual percept