等离子体的临界温度

Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi

发表于:2018-12-01 / 阅读(325) / 评论(0) 分类 新东方背诵文选

Now the speed of light is a very,very big number. 光速是个很大的数字 So if we just take a small amount of mass, 所以只要一点点质量 you get a huge amount of energy. 就含有大量能量 And that's the energy which actually powers ou

发表于:2018-12-07 / 阅读(234) / 评论(0) 分类 太阳科普

This is the VOA Special English Development Report. Before refrigerators, homes usually had ice boxes. But another way to keep food cool without the need for electricity is to use an evaporative cooler. This is easy to make and does not even use ice.

发表于:2018-12-07 / 阅读(146) / 评论(0) 分类 VOA慢速英语2007年(二)月

This is the VOA Special English Development Report. Indonesian women sell their harvest in a traditional floating market Before refrigerators were invented, the next best thing was an ice box. But another way to keep food fresh is to use an evaporat

发表于:2018-12-07 / 阅读(149) / 评论(0) 分类 VOA慢速英语2009年(十一)月

Situation Critical 十万火急 by Kevin Lustig In some jobs, danger can appear at any moment. In the blink of an eye, the routine can become perilous. This month, the National Geographic Channel shows us what happens when a normal situation becomes

发表于:2018-12-08 / 阅读(205) / 评论(0) 分类 常春藤解析英语

The UN has just issued a report saying that six million people in Myanmar need food right now. How critical is the situation? It's a real paradox, because in the same year that Cyclone Nargis devastated the, what had been the rice bowl of Myanmar, th

发表于:2018-12-11 / 阅读(194) / 评论(0) 分类 访谈录2009

In Houston, Flight director Kranz is trying to make sense of the barrage of information. I am completely surrounded with reports coming in that I dont fully understand, but frankly, problems are our business, and I thought we are going to solve these

发表于:2018-12-30 / 阅读(248) / 评论(0) 分类 国家地理2007年

By Greg Flakus Houston 05 March 2008 Hillary Clinton made a stunning comeback in Tuesday's primaries and caucuses, winning decisively in Ohio and Rhode Island and coming out on top of a close race in Texas. John McCain won all four states, to clinch

发表于:2019-01-08 / 阅读(182) / 评论(0) 分类 VOA标准英语2008年(三月)

By Melinda Smith Washington 06 September 2007 In 2006, the World Health Organization issued a report that a critical shortage of doctors and nurses has contributed to severe health problems in Africa and parts of Asia.The report said at least four mi

发表于:2019-01-08 / 阅读(238) / 评论(0) 分类 2007年VOA标准英语(九月)

Some bacteria have adapted to super cold environments for millions of years. And scientists have isolated some of the essential genes that allow bacteria to tolerate their harsh living conditionsbecause these same genes might help in the creation of

发表于:2019-01-11 / 阅读(201) / 评论(0) 分类 英语杂谈

How to build an evaporative cooler. Also, how to prepare fruits and vegetables for cold storage. Transcript of radio broadcast: 08 June 2008 This is the VOA Special English Development Report. Before refrigerators, homes usually had ice boxes. But a

发表于:2019-01-11 / 阅读(188) / 评论(0) 分类 VOA慢速英语2008年(六)月

Fusion is how stars produce energy. It occurs when the nuclei of light atoms, such as hydrogen, are fused together under extreme pressure and heat. Tokamak Energy, from Oxfordshire, believes that the third version of their compact, spherical tokamak

发表于:2019-01-17 / 阅读(250) / 评论(0) 分类 2015CRI中国国际广播电台

好吧 Well... -那我该给克瑞普克下毒 -不 - I suppose I could poison Kripke. - No! 不 这其实很简单 No. It's a simple matter. 有那么几种有毒化学物 There are several toxic chemicals 尸检是查不出来的 that'd be untracea

发表于:2019-01-28 / 阅读(188) / 评论(0) 分类 生活大爆炸第三季

BEIJING, Dec. 11 (Xinhua) -- China is faced with severe challenges in collecting enough blood plasma to produce medicines, Health Minister Chen Zhu said Sunday. Chen called on the public to join blood donation after donating blood plasma at the Beiji

发表于:2019-02-07 / 阅读(165) / 评论(0) 分类 英语新闻

You might not realise it, but sending even a short email has an impact on the environment. 你可能没有意识到,即使是发送一封小小的邮件也会对环境产生影响。 Scientists estimate that an email adds about four grams (0.14 oun

发表于:2019-02-08 / 阅读(219) / 评论(0) 分类 阅读空间

In the Pacific state of Hawaii, U.S. President Barack Obama on Sunday told leaders of the 21 Asia Pacific Economic Cooperation economies that the region will be key to U.S. economic recovery. With much of the formal summit activity, including a worki

发表于:2019-02-08 / 阅读(187) / 评论(0) 分类 英语新闻

One of my favorite examples of liminal excellence comes from the late Dr. Claudia Alexander, 我最欣赏的一位具有交叉才能的榜样是已故的克劳迪娅亚历山大博士, a black woman plasma physicist, who passed away this past July

发表于:2019-02-13 / 阅读(173) / 评论(0) 分类 TED演讲国际问题篇

Listen to the statements and check the correct answers. 1.Is sweeping out the tiny dust bothering you a lot? From now on if you have this machine, doing the housework will become a very easy job. This is a portable vacuum cleaner. lt's light and wire

发表于:2019-02-17 / 阅读(153) / 评论(0) 分类 英语听力练习题

By Scott Stearns Dakar 08 October 2009 Cameroon President Paul Biya (file photo) Authorities in Cameroon have closed a private FM radio station that has been broadcasting illegally from the capital for several months. The station was highly critical

发表于:2019-02-18 / 阅读(155) / 评论(0) 分类 VOA标准英语2009年(十月)

CHENGDU, May 5 (Xinhua) -- Chinese Health Minister Chen Zhu donated plasma on Saturday in Chengdu, capital of southwest China's Sichuan Province, and called on health workers to take the lead in blood donation to ease the country's blood supply short

发表于:2019-02-18 / 阅读(168) / 评论(0) 分类 英语新闻
学英语单词
absorption limiting frequency
al aflaj
amahouk
animal organic morphology
Antiqua
Assad
assets portfolio
asynchronous quenching
Bairkum
balloon dilator
Bologna sausage, bologna sausage
breakoff
bromamines
cashdesk
christodoulos
collineatory transformation
composite random terms
computer compiler
coronal odontoma
cotton waste
cross Nicol prism
crustacerubin
curet
current-feedback amplifier
Cyanomethylamine
date corrector spring
dayberry
Defloat
deordorization
distorque
double toggle actuator
epothilone
family Scutigeridae
fishponds
fluoroscoped
free cutting copper
free position
freight ferry
full horsepower
FWD & pinch on
gyratory sand riddle
hanging block
hatch spot
hitting it off
hot continuous rolling
Hoya fungii
illfated
ir spectra
isorhodanic acid
Jack. & L.
knife-edge and anvil
Kompong Som, Chhung
look out over
m. abductor pollicis longus
microphysid
middle-of-the-roadism
morbus major
n.h
naval strategies
non poor
normal trilinear coordinates
Novolakskoye
O'Neill
optically active polymer
oring
partician
PcoR
pepe loop
piget
point velocity
postural hypertension
price priority
probe station
propeller thrust direction indicator
Rassolenko
registers
resistance flow
revenue export duty
Rhamnus liukiuensis
rhossilis
rings up
risus
scrimpy
seq.
sound measuring
special agent
spring oiler
Sremska Mitrovica
standard analog circuit
stellited valve
supersonic roll extrusion
surface polarization
tibial nerve
toilet case
tree canopy
trim one's sails
Valencian Community
voice operated coder
Wad al'Ubayd
Waverly group
weather plotter receiver
yellow ingot metal