波能密度

Passage 20 Waves How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way in waves! Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light

发表于:2018-11-30 / 阅读(175) / 评论(0) 分类 英语专业四级听写

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(384) / 评论(0) 分类 超大质量黑洞

One of the newest sources of alternative energy is also one of the oldest - water power. The 19th century water wheel, though, bears no resemblance to the 21st century contraptions powered by ocean waves. The wave energy sector has been slow to coale

发表于:2018-12-16 / 阅读(102) / 评论(0) 分类 VOA标准英语2010年(十一)月

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(88) / 评论(0) 分类 VOA标准英语2016年(二月)

Local governments in many parts of eastern China are taking steps to try to conserve energy in the midst of the heat wave which has seen temperatures in many parts of the region top 40-degrees. CRI's Shen Chengcheng with more. Heat alerts have been i

发表于:2018-12-19 / 阅读(111) / 评论(0) 分类 世界各地新闻集锦

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(113) / 评论(0) 分类 2017年VOA慢速英语(五)月

(THEME) VOICE ONE: This is Steve Ember. VOICE TWO: And this is Faith Lapidus with the VOA Special English program EXPLORATIONS. You are listening to our program today on a radio. Almost no communication would exist in the world without the electromag

发表于:2019-01-03 / 阅读(146) / 评论(0) 分类 2018年VOA慢速英语(九)月

By Stefan Bos Budapest 26 June 2007 A heat wave has killed dozens of people in Central and Southeastern Europe, most in Romania, where authorities have issued a code orange alert in the capital Bucharest and in eight counties. There are also concerns

发表于:2019-01-07 / 阅读(125) / 评论(0) 分类 2007年VOA标准英语(六月)

We're dedicating this edition of CNN Student News to our audience in Japan. The world is watching in support, and you are not alone. The nation of Japan is reeling today, trying to recover from a devastating natural disaster. The earthquake hit the i

发表于:2019-01-08 / 阅读(149) / 评论(0) 分类 CNN2011年(三)月

Waves 波浪 A wave is the movement of water. 波浪是水的运动。 Why do waves happen? 波浪是怎么产生的呢? Waves are made when the wind blows over the surface of water. 风吹水面就会产生波浪。 On the beach, you probably watc

发表于:2019-01-10 / 阅读(109) / 评论(0) 分类 与美国小学生一起学英文第10册

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(127) / 评论(0) 分类 2014年VOA慢速英语(九)月

US Agency Announces Wave Energy Prize Competition 美国能源部发起能源奖竞争 Experts say that sun and wind are the richest sources of clean, renewable energy. But ocean waves also create powerful, clean energy. So, the U.S Department of Ene

发表于:2019-01-12 / 阅读(127) / 评论(0) 分类 2015年VOA慢速英语(五)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(93) / 评论(0) 分类 VOA标准英语2015年(十二月)

Harnessing Ocean Wave Power Provides Cheap Electricity 利用海洋波浪提供廉价电力和饮用水 WASHINGTON An often overlooked renewable energy resource is the power of ocean waves. Scientists in California say harnessing energy from the regu

发表于:2019-01-14 / 阅读(101) / 评论(0) 分类 VOA标准英语2014年(三月)

RACHEL MARTIN, HOST: I say renewable energy and you probably think wind or maybe the sun. You might be able to put the ocean's waves on that list, too. The Department of Energy is experimenting with this idea. The department is spending $40 million t

发表于:2019-01-16 / 阅读(104) / 评论(0) 分类 2017年NPR美国国家公共电台11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(90) / 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(122) / 评论(0) 分类 英文语法词汇

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(92) / 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(112) / 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(147) / 评论(0) 分类 2016CRI中国国际广播电台
学英语单词
accounting entry
aligning plug
amputated propeller
anticomplement
aquapulper
Balloch
blind main pipe
bossey
Braddon, Mary Elizabeth
c-mycs
centralized instrument panel
circulating flow
clawer
Coming events cast their shadows before .
consumption-led
conversion of profit into average profit
copyright work
creepages
cutaneous nerve
Dammfleth
data requirement language
decatur l.
deep-etch method
drill spindle support
durol
electric remote
electromagnetic oven
electromagnetic vulnerability (emv)
enjoy yourself
equated call
event management
exchange frequency
finned-tube
flow gaging weir
flush of dawn
geostrophic
gi bleeding
grievance
Grolier
guiding field
halakhist
highpoint
horked
hypercomputations
iced firn
improved variety improved breed
Jangamo
Jewish Alps
jirk
juridical practice
juvenesence
lizelle
long-term departure
lower-level vision
lushes
master production plan
MCI-154
meson beam
mid-atlantic
Miziya
monogamous species
morphographic map
MVNO
mycin
nitrogen mineralization
nozzle cross-section
nuptses
oil return tube
on the ___ front
Ovarid
Palmarin
Pardubice
perigraphic
poltical
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pulverized coal firing equipment
rated moment
receptarius
recruitment and selection
royal greenwich observatory (rgo)
scupper nail
scyliorhinidaes
self-concerns
Shankill Road
small bundle
sneaps
solar-assisted
soybean research personnel
superannuation funds
tamarixionol
Th B
three-in-one drawbar
threonine
to separate
Tyagaraja
Tyukalinsk
ullage engine
under-ripe
Wainwright Air Force Base
warning signals
welding hull structure
worm families