能量表面密度

A supermassive black hole is quite simply gravity gone mad. An object of such concentrated matter its gravitational pull is insatiable. Nothing can escape it, not even light itself. Anything that gets

发表于:2018-12-07 / 阅读(329) / 评论(0) 分类 超大质量黑洞

微波炉发明源于一项最高军事机密 Many people around the world use a microwave oven every day, not knowing that a crucial part of it was once a top military secret. 世界上许多人每天都在使用微波炉,但却不了解它曾经是一

发表于:2018-12-16 / 阅读(52) / 评论(0) 分类 VOA标准英语2016年(二月)

This is Scientific American's 60-Second Science, I am Steve Mirsky, got a minute? You are pulling the tape off the roll and it starts to tear, or you are moving wallpaper and it refuses to strip off in strips or in what may be the most infuriating ca

发表于:2018-12-24 / 阅读(71) / 评论(0) 分类 Scientific American(三)月

(Woman) Today I want to talk about the Earth's last major climatic shift, at the end of the last ice age. But first, let's back up a moment and review what we know about climatic change in general. First, we defined climate as consistent patterns of

发表于:2018-12-30 / 阅读(115) / 评论(0) 分类 托福听力短文

Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t

发表于:2019-01-02 / 阅读(102) / 评论(0) 分类 火星生命

American inventor John Goodenough first started working on battery technology more than 40 years ago. Goodenough actually co-invented lithium-ion batteries in 1980. This eventually led to a revolution in the electronics industry because those devices

发表于:2019-01-02 / 阅读(69) / 评论(0) 分类 2017年VOA慢速英语(五)月

-Im Chris Kaufman and I here with Justin Kasper, who works at Smithsonian, hes an astrophysicist at the Smithsonian. And he's won a project thats gonna launch a probe at the sun, specifically the Solar Wind Electrons Alphas and Protons investigation,

发表于:2019-01-07 / 阅读(87) / 评论(0) 分类 万花筒2013年

Turning Cigarette Butts to Batteries 烟头转变成电池 If you see a person carelessly throw a cigarette to the ground, what are you likely to think? That depends. If you hate people throwing things on the ground, you might think, That person shou

发表于:2019-01-12 / 阅读(91) / 评论(0) 分类 2014年VOA慢速英语(九)月

Scientists and politicians have gathered in the Indonesian city of Manado for the World Ocean Conference. They are discussing the role of oceans in mitigating climate change and how climate change affects the world's seas, but their efforts are hamp

发表于:2019-01-13 / 阅读(59) / 评论(0) 分类 VOA标准英语2009年(五月)

Chicagos Argonne Lab Developing Battery of the Future CHICAGO In 2012, the Department of Energys Office of Science awarded a $120 million grant to a new technology center focused on battery development - headquartered at Argonne National Laboratory i

发表于:2019-01-14 / 阅读(58) / 评论(0) 分类 VOA标准英语2014年(七月)

How Military Research Finds Its Way to Everyday Life 军事研究是如何走进日常生活的? WASHINGTON Sometimes simple scientific advances in one field can have value far beyond their intended use. Many of these advances can change the world an

发表于:2019-01-14 / 阅读(48) / 评论(0) 分类 VOA标准英语2015年(十二月)

By Brian Padden Paris 21 June 2007 The airline industry has long sought to develop new technology to offset the rising cost of fuel, but the industry also has looked to make flying more energy efficient. This year at the Paris Air Show many companies

发表于:2019-01-30 / 阅读(84) / 评论(0) 分类 2007年VOA标准英语(六月)

Scientists from the University of Central Florida (UCF) have created a supercapacitor battery prototype that works like new even after being recharged 30,000 times. 来自中佛罗里达大学(UCF)的科学家已经创造了一个超级电容电池

发表于:2019-02-02 / 阅读(58) / 评论(0) 分类 英语新闻

matter 物质 energy 能 vacuum 真空 liquid 液体 fluid 流体 solid 固体 body 物体 mass 质量 weight 重量 density 密度 specific gravity 比重 gravity 重力 velocity 速度 kinetic energy

发表于:2019-02-07 / 阅读(89) / 评论(0) 分类 英文语法词汇

2006职称英语考试模全真拟试题理工类B级(二) 第一部分:词汇选择(第1-15题,每题1分,共15分) 下面共有15句子,每个句子均有一个词或短语划有底横

发表于:2019-02-07 / 阅读(69) / 评论(0) 分类 实用英语

如今,高端大气上档次已经成为众人耳熟能详的网络用语,凭借其无与伦比的受欢迎度,高端大气上档次一度位居十大网络用语的榜首。这句让无数互联网迷们捶足顿胸的潮流时尚用语,到底

发表于:2019-02-08 / 阅读(74) / 评论(0) 分类 英语口语

This dark energy doesn't behave like any other substance we know at all and acts more like antigravity force. 这种暗能量的性质与我们所熟知的其他物质完全不同,它更像是反重力。 We say that it has a gravitational pressure

发表于:2019-02-13 / 阅读(55) / 评论(0) 分类 TED演讲教育篇

Looking up at the night sky, we are amazed by how it seems to go on forever. 仰望夜空,我们为它的永无止境而感到惊讶。 But what will the sky look like billions of years from now? 然而数十亿年前的天空又会是什么样子呢

发表于:2019-02-13 / 阅读(66) / 评论(0) 分类 TED演讲教育篇

After failing in Beijing's license plate lottery system for some three years, Qin Xiaofei finally made his decision in January to buy a battery-driven car to chauffeur his wife who has recently become pregnant. But, he says, one of the biggest concer

发表于:2019-03-04 / 阅读(103) / 评论(0) 分类 2016CRI中国国际广播电台

16.The early railroads were........the existing arteries of transportation: roads,turnpikes, canals,and other waterways. A.those short lines connected B.short lines that connected C.connected by short lines D.short connecting lines 答对率:50% 答案

发表于:2019-03-12 / 阅读(129) / 评论(0) 分类 托福英语
学英语单词
adjustable pusher train
allowance for drift
analog multiplexer
arithmetic genus
audioimpedance measurement
beam steering
berntsen
booter ies
calciphobes
CH31
cobaltyl sulfate
committee of inspection
compensation strip
crankcase oil types
crocus paper
demissions
Dibdinian
digit driver
diphtheritic inflammation
DMHP
doddling
double-gap
drunk-and-disorderlies
ductus hepaticus communis
DWO
dyspancreatism
earthing inductor
economic policies
eighty-ninth
emendatus
extra warp
fish-gig
fractional program
gay for the stay
genus Melanogrammus
golden oriole
gray hematite
habitus
Hetl.
hierogrammatist
impact tension test
imperfect leaf
internal diseconomics of production
intracluster
inverse logarithm
iron content
jodorowsky
keratinocyte
kessoglycerin
knopman
Krasneno
leading hooked fibre
levertin
license suspension
line balance converter
loanable funds
low temperature presintering
macroassociation
magnetic after effect
martileys
mud crusher
nasendoscopies
nemophilist
no-lose
noel (france)
nominal gas flow
orogenics
outvoted
Palatrize
Pasteurella bubaliseptica
Port Darwin
potassium niobate
praeputial gland
projective algebraic variety
Rajakhera
regularize
relative surface wear
riccardia kodamae
rmsm
roller hearth continuous rotaflame furnace
selfblocking
set bolt
sex parties
silicon-strip detector
sinnings
slide kip
software algorithm
stay time
stump neuroma
superinvariants
temper mill
Tolo Harbour
trillionaires
trush-trash
two-line or multi-line braking system
us mm
user authentication
very large crude oil carrier (vlcc)
vigoureux printing
Wanbao
worsted cheviot
wrapping angle