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
airflow mechanics
algol system
base memory address
Beastings.
betterance
blank fixe
braveness
capillary water
central finance
cephem
chemical overvoltage
circumcentre of a triangle
class Cephalopoda
clear-ups
coal preparation plant
color analyser
comprehensives
consular fee
Contract of Towage Sea
curcuma powder
cycle billing
decarboxyloation
decimal point position
deflector bucket
double total adding machine
duty-bearer
ebrangle
edinburgh prolog
electromagnetic loud speaker
electroslag refining
equally probable
Ergolding
feminisers
field domain
flew the coop
force of crystallization
fuel defect
geary's ratio
general requirements
glad to meet you
great paternoster pt. (groot-paternosterpunt)
groupers
hair powder
handling quota
hard metal band
henched
hot-blast
isopeulustrin
kalloplankton
knobbed claw
layered pile
lead paralysis
limited range provenance trial
Lohrville
manufacturing defects analyzer
marquez
mechanical stacker
memory load key
merchandise ledger
meridian holes
microcomputer s-100 bus
military-minded
mud skipper
natural heat dissipation
Nervilia cumberlegei
observation platform
octodenary
outbade
paper cambric
photelometer
pre informed
presswood
principal-agent problem
propane-acid process
pseudodemocracy
pteria peasei
puech
pump operating point
raft-wood
rated input
reduction lens
rezel
selenium(iv) iodide
self-mutual induction
short-haul
single-focusing mass spectrometer
smart database
sodium p-aminobenzenesulfonate
source statement field
sporhase
state-to-state reaction dynamics
stsaskses-s
superheating steam
sustainable energy
trajective curve
two way phase switcher
unsoldiered
untempted
uruks
WAMZ
Web collaboration
yavin