太阳科普 第7期

As they grow bigger and bigger, 随着体积越来越大 they start to spin and throw out a disk of debris 它们开始旋转，甩出的碎屑形成盘状 that will coalesce to form a solar system. 在日后融合形成太阳系 This kind of process

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

TED演讲:原子究竟有多小?(1)

You probably already know everything is made up of little tiny things called atoms 你也许已经知道所有的东西都是由微小的原子组成。 You might even know that each atom is made up of even smaller particles called protons, neutrons

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

TED演讲：用"云"建立一所学校(11)

It's been tried all over the world, and teachers sort of stand back and say, It just happens by itself? 在世界各地尝试过，老师们后退着说：它就这么自己发生了？ And I said, Yeah, it happens by itself.How did you know that? 我说

万物简史 第9期:如何营造一个宇宙(1)

Part I Lost in the cosmos 第一章 如何营造一个宇宙 They're all in the same plane.They're all going around in the same direction. . . . 它们都处于同一平面。 它们都在沿同一方向转动...... It's perfect,you know. It's gorgeo

SCIENCE IN THE NEWS - Polio Vaccine Ban in Parts of Nigeria

SCIENCE IN THE NEWS - Polio Vaccine Ban in Parts of Nigeria / Safety Laws Urged for India / Two More Elements? By Broadcast: Tuesday, March 02, 2004 (THEME) VOICE ONE: This is SCIENCE IN THE NEWS, in

英语新闻视频 Beijing bans smoking in taxis

From Sunday, smoking is banned in Beijing's taxis. The Green Taxi campaign is part of the city's efforts to ensure a smoke-free Olympic Games next year. No smoking signs will be put up in all of Beijing's 66,000 taxis. Drivers who are caught smoki

2015-05-22 BBC:星光七纪元-36

The calculations focus on a strange quality of all matter. It's one that defies common sense. But it's fundamental to the work of Astrophysicists like professor Douglas Leonard. Solidity is an illusion. If I run up with my fist and punch a burg wall,

英语听力文摘 English Digest 493、惨淡的人生

The Nucleus Don: A guy walks into a bar, and sits down next to an electron . The electron has two empty beers in front of him, and was working on a third. My life is a worst, says electron . I just got fired from my job, my dog bit me, my wife left w

万物简史 第147期:基本物质(19)

The structure of atoms and the significance of protons will come in a following chapter, so for the moment all that is necessary is to appreciate the organizing principle: hydrogen has just one proton, and so it has an atomic number of one and comes

60秒科学:Carbonation Has a Taste

Carbonation Has a Taste In a study in the journal Science, researchers found that the taste buds for sensing sour also respond to carbonated beverages, because the fizz gets turned into chemical components, one of which is protons--basically simple,

万物简史 第210期:威力巨大的原子(24)

To explain what kept atoms together, other forces were needed, and in the 1930s two were discovered: the strong nuclear force and weak nuclear force. The strong force binds atoms together; its what allows protons to bed down together in the nucleus.

英语听力精选进阶版 6366

Do you appreciate the small things in life? In physics, infinitely small things are problematic. If a structure can be infinitely divided into smaller parts, can there be such a thing as a smallest possible space or does this division go on eternally

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