[建] 内聚能密度

40 Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ni

发表于:2018-11-28 / 阅读(340) / 评论(0) 分类 新概念优美背诵短文50篇

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(391) / 评论(0) 分类 超大质量黑洞

Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. U

发表于:2018-12-15 / 阅读(247) / 评论(0) 分类 新东方背诵文选

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(90) / 评论(0) 分类 VOA标准英语2016年(二月)

A senior United Nations official warns that economic inequalities in the Asia-Pacific region could worsen as energy costs rise. Energy security and poverty reduction are key themes at this week's meeting of the U.N. Economic and Social Commission for

发表于:2018-12-19 / 阅读(69) / 评论(0) 分类 VOA双语新闻 2008年4月

Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the nineteenth century, the moveme

发表于:2018-12-30 / 阅读(143) / 评论(0) 分类 考研背诵50篇

How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a

发表于:2018-12-31 / 阅读(81) / 评论(0) 分类 英语听力文摘 English Digest

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(116) / 评论(0) 分类 2017年VOA慢速英语(五)月

概述: Module format IELTS Academic Writing lasts a total of 60 minutes. It consists of 2 tasks (Writing Task 1 and Writing Task 2) and candidates must answer BOTH tasks. Answer format Candidates write their answers in pen or pencil on Answer Shee

发表于:2019-01-08 / 阅读(163) / 评论(0) 分类 雅思英语

Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ninete

发表于:2019-01-08 / 阅读(108) / 评论(0) 分类 英语小短文

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(130) / 评论(0) 分类 2014年VOA慢速英语(九)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(103) / 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(96) / 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(127) / 评论(0) 分类 2007年VOA标准英语(六月)

By Ron Corben Bangkok 28 April 2008 A senior United Nations official warns that economic inequalities in the Asia-Pacific region could worsen as energy costs rise. As Ron Corben reports from Bangkok, energy security and poverty reduction are key them

发表于:2019-01-31 / 阅读(92) / 评论(0) 分类 VOA常速英语2008年(四月)

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(95) / 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(124) / 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(94) / 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(116) / 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(149) / 评论(0) 分类 2016CRI中国国际广播电台
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