娜塔莉波特曼哈佛大学演讲 第9期

People always talk about diving into things you're afraid of. That never worked for me. 人们总是说要放手去做你害怕的事。这对我而言行不通。 If I'm afraid I run away, and I would probably urge my child to do the same. 如果我害

TED演讲:原子究竟有多小?(2)

So if you popped open the blueberry and were searching for the nucleus 如果你在蓝莓的内部搜索原子核，结果是一无所获。 You know what? It would be invisible. It's too small to see! 知道为什么吗？因为我们看不到它！它

赖世雄学英语第四册 lesson 4

[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

SSS 2011-09-27

This is Scientific American's 60-Second Science. I'm Sophie Bushwick. Got a minute? The shortest distance between two points may be a straight line, but try telling that to electrons: when current flows down a wire, these particles zig and zag, movin

英语听力文摘 English Digest 655 富兰克林与他的毛皮实验

Ben Franklin And A Very Furry Situation When they hear the name Ben Franklin, many folks think of the Declaration of Independence, the Continental Congress and things like that. Not as many people remember that Franklin was an inventor . . . and a go

英语语法：107 When to Leave Out "That"

Grammar Girl here. Today's topic is the word that. When do you need it, and when can you leave it out? Also, I'll have an announcement at the end of this show about extra book giveaways and my book tour. Now, guest-writer Bonnie Trenga writes, Today

60秒科学:Forcing Electrons into Superconducting Line

Forcing Electrons into Superconducting Line In a study in the journal Nature researchers created a pseudo gap, in which electrons in superconducting materials line up just before flowing resistance-free. Sonya Buyting reports Imagine a world with lev

TED演讲:一项关于电动车的大胆计划(4)

You, today, buy gasoline miles. And we created electric miles. 现在大家买的是汽油里程。我们就创造电子里程。 And the price of electric miles ends up being a very interesting number. 电子里程价钱加起来是个有趣的数字。

TED演讲:一项关于电动车的大胆计划(1)

So how would you run a whole country without oil? 怎么让一个国家在没有用石油的情况下运转？ That's the question that sort of hit me in the middle of a Davos afternoon about four years ago. 四年以前在Davos的一个下午，这个

英语歌曲:Happily Never After

Happily Never After I don't think I want this anymore As she drops the ring to the floor She says to herself: 'You've left before' This time you will stay gone, that's for sure And he shouted something else She dragged her suitcase down the path, To

VOA慢速英语 2008 1207

VOICE ONE: I'm Phoebe Zimmermann. VOICE TWO: And I'm Steve Ember with People in America in VOA Special English. Today we tell about a man who made possible one of the most important communications devices ever created -- television. His name was Phi

TED演讲:为什么玻璃是透明的(2)

But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids. 但是这还是不能解释为什么光可以穿透玻璃而不是像其他大多固体那样被吸收。 For that, we need to go a

TED演讲:见证现代奴役的照片(8)

I met these boys at five in the morning, when they were hauling in the last of their nets, 我在早上五点时看到这些男孩子们，在收最后一个渔网， but they had been working since 1 a.m. in the cold, windy night. 可他们从凌晨

AGRICULTURE REPORT - Irradiated Meat

AGRICULTURE REPORT December 17, 2002 — Irradiated Meat This is the VOA Special English Agriculture Report. The United States government has approved methods of destroying bacteria in meat by using r

PEOPLE IN AMERICA - Philo Farnsworth

PEOPLE IN AMERICA - Philo Farnsworth By Paul Thompson Broadcast: Sunday, June 06, 2004 (MUSIC) VOICE ONE: I'm Phoebe Zimmermann. VOICE TWO: And I'm Steve Ember with People in America in VOA Special En

英文歌曲：Julie Peel《Near the Sun》 最接近太阳的地方

歌词 I never thought I could get near the sun this close And not be burned My fear of running high upon the hills and fall Has disappeared I can put on my fake and almost real pair of wings And I can play with the wind and lay on it And just drift

美语听力 English Cafe 141

Topics: Classic childrens television: Sesame Street and Mr. Rogers Neighborhood; American Cities: Washington, D.C.; mix, combine, stir, and beat; stock photography Words: series episode animation puppet make-believe values founding fathers Congress f

【英语时差8,16】利用太阳能-下

PV solar technology is more complex. When sunlight hits a PV cell, electrons in the cell are knocked out of their orbits. Electric fields channel the electrons in a current used to generate electricity。 Unlike thermal solar panels, PV technology is

万物简史 第202期:威力巨大的原子(16)

It was while puzzling over this problem that Bohr was struck by a solution and dashed off his famous paper. Called On the Constitutions of Atoms and Molecules, the paper explained how electrons could keep from falling into the nucleus by suggesting t

万物简史 第198期:威力巨大的原子(12)

Let us pause for a moment and consider the structure of the atom as we know it now. Every atom is made from three kinds of elementary particles: protons, which have a positive electrical charge; electrons, which have a negative electrical charge; and