[化] 活性氢原子

A Century of Memories (1940-1949) On the first Sunday in December 1941, Americans were doing what Americans did on any normal Sunday.

发表于:2018-11-28 / 阅读(276) / 评论(0) 分类 疯狂英语2003年

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(210) / 评论(0) 分类 VOA2003(上)-科技导航

[00:00.00]Lesson 4 Atom [00:01.95]原子 [00:03.89]The really strange thing about atoms is that most of us will never see one. [00:08.87]原子最奇特之处在于绝大多数人永远也无法看到它。 [00:13.84]Atoms are so small that it's impo

发表于:2018-12-08 / 阅读(160) / 评论(0) 分类 赖世雄学英语第四册

雅思听力场景词汇:化学词汇 在雅思听力考试场景中,化学相关的场景的词汇较为生涩,平时生活中可能也运用得比较少,以下的词汇供大家参考喔。 molecule 分子 particle 粒子 ion 离子 particle

发表于:2018-12-19 / 阅读(220) / 评论(0) 分类 雅思英语

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

Ecological balance - astable balance in the numbers of each species in an ecosystem. In the ecosystem of the mouth this balance is brought about by competition and cooperation between the different or

发表于:2019-01-03 / 阅读(205) / 评论(0) 分类 医务英语

Covalent bond - a strong bond between atoms formed by sharing outer electrons. When an atom has 8 outer electrons it is stable. Those which naturally have 8, like neon and argon gasses are quite unrea

发表于:2019-01-03 / 阅读(219) / 评论(0) 分类 医务英语

This is Scientific American's 60-second Science, I'm Steve Mirsky. Got a minute? Back on January 15th, US Airways Flight 1549 made that amazing water landing in the Hudson after both engines were taken out by Canada geese, which can weigh eight pound

发表于:2019-01-08 / 阅读(192) / 评论(0) 分类 Scientific American(六)月

We have bigger houses and smaller families; more conveniences, but less time; we have more degrees, but less common sense; more knowledge, but less judgement; more experts, but more problems; more medicine, but less wellness. We have multiplied our p

发表于:2019-01-08 / 阅读(142) / 评论(0) 分类 英语美文

We have multiplied our possessions, but reduced our values. We talk too much, love too little and lie too often. We've learned how to make a living, but not a life; we've added years to life, not life to years. We have taller buildings, but shorter t

发表于:2019-01-11 / 阅读(181) / 评论(0) 分类 阅读空间

(一)a is n times as small (light,slow,)as b. a is n times smaller (lighter, slower,) than b. 以上两句均应译为:a的大小(重量,速度,)是b的1/n[或a比b小(轻,慢,)(n-1)/n]. e.g. The hydrogen atom is near1y l6 times as

发表于:2019-01-17 / 阅读(193) / 评论(0) 分类 英语口译

英语中表示倍数减少的表达方法(一)a is n times as small (light,slow,)as b. a is n times smaller (lighter, slower,) than b. 以上两句均应译为:a的大小(重量,速度,)是b的1/n[或a比b小(轻,慢,)(n-1)/n]. e.g

发表于:2019-01-17 / 阅读(182) / 评论(0) 分类 英语口译

Fortunately more sober types were at work elsewhere. In 1808, a dour Quaker named John Dalton became the first person to intimate the nature of an atom (progress that will be discussed more completely a little further on), and in 1811 an Italian with

发表于:2019-01-29 / 阅读(165) / 评论(0) 分类 万物简史

The structure of atoms and the significance of protons will come in a following chapter, so for the moment all that is necessary is to appreciate the organizing principle: hydrogen has just one proton, and so it has an atomic number of one and comes

发表于:2019-01-29 / 阅读(177) / 评论(0) 分类 万物简史

LONDON, July 4 (Xinhua) -- Anders Fogh Rasmussen, Secretary General of the North Atlantic Treaty Organization (NATO) expressed his hope on Wednesday that NATO would seek a more active dialogue with China. We must expand the range of nations with whom

发表于:2019-01-30 / 阅读(238) / 评论(0) 分类 英语新闻

SEOUL, Nov. 8 (Xinhua) -- Samsung Electronics, the world's largest flat screen TV vendor, said Tuesday that it has suspended its plan to develop active shutter three-dimensional (3D) TVs with RealD, the U.S.-based 3D technology supplier. Samsung has

发表于:2019-01-30 / 阅读(209) / 评论(0) 分类 英语新闻

Back on January 15th, US Airways Flight 1549 made that amazing water landing in the Hudson after both engines were taken out by Canada geese, which can weigh eight pounds each. Now scientists have used forensic techniques to clear local geesethe per

发表于:2019-01-30 / 阅读(189) / 评论(0) 分类 60秒科学

今天我们要学的词是active duty。 Active duty, 现役的。星期一是美国阵亡将士纪念日。 My friend Jack is an active duty Army Captain who has deployed overseas three times, 我朋友杰克是现役陆军上尉,先后三次被派

发表于:2019-02-05 / 阅读(205) / 评论(0) 分类 英语每日一词

俗话说:一母生九子,九子各不同。这句话在我邻居家孩子的身上体现得淋漓尽致。大女儿心灵手巧,做什么像什么;而二女儿却刚好相反,总是笨手笨脚。All thumbs就用来形容她这种笨手笨脚

发表于:2019-02-06 / 阅读(161) / 评论(0) 分类 实用英语

1.心事重重 some thing weighs heavily on ones mind The boss is quite down these days. He seems to have something weighing heavily on his mind. 老板这几天沉默寡言,看起来好像是心事重重的 2.苦苦哀求 press ones suit She press

发表于:2019-02-19 / 阅读(170) / 评论(0) 分类 英语口语
学英语单词
ace buddies
adalah
air shower unit
aleiptic
allenoic acid
ambassadrix
Andersen Airforce Base
arch-loop-whorl
area temporalis
asparol D
astatic error
basic cobol
birdlives
bowl-feed polishing process
C3BR
Callerya dielsiana
capital of Panama
Check Weigh Scales
citrations
compound link
cooks the books
COPAC
cyclohexenecarboxylic acid
degraded copy
depth tool
diskette
DiuralFurosemide
dpt.
driveress
egg yolk lecithin
ethyl benzenesulphonate
exogenous business cycle theory
fast-approaching
feminism
fine ground
first-world-war
flagstaff socket
geronimo
get your wings
glucuronyl-
glutched
great-coats
gully-gully
guralnik
harum-scarums
hkc
hydrocarbon sweetening
infelicitousness
inorganic dust
input element
intra-epiphysial
Istiophorus albicans
loopcoupled
macrodipoles
made haste
manure juice
materazzo
meteorology channel
microcode compilation
microcomputer functions
mis-seek
multi-effect lithiumbromide-absorption heat pump unit
municipal university
musculi cutis diagonales
nagarajan
Napuka Atoll
noninterruptive
paragentic mineral
Peperomia heyneana
peripheral compartment
pieris floribunda benth.et hook
plushly
poteet
printed circuit technology
radiotag
reference feedback
reyhan
road-finishing machine
roll shearing machine
rubber grommet
sauerkraut
scouring auxiliary
sley reed
slug catcher
spatial dose distribution
spelters
statement law
strip check
subresin
subroutine separation
summer range
surveilling
thealia
Thiiodomethane
Thyrolar
TINAR
trunch
twin study
underpriming
upjet
width of damage
wording