By their very definition,black holes are 1) objects which are not supposed to 2) emit anything .It therefore seemed that the area of the 3) event horizon of a black hole could not be regarded as its 4

发表于:2018-11-28 / 阅读(144) / 评论(0) 分类 疯狂英语2002年

00:03.04]黑洞 [00:06.09]What is a black hole? [00:07.11] 什么是黑洞呢? [00:08.12]Well,it's difficult to answer this question,since the terms we would normally use to describe a scientific phenomenon are inadequate here. [00:14.11]喔,这个问题很难回答,

发表于:2018-12-04 / 阅读(182) / 评论(0) 分类 大学英语自学教程下

Space Mysteries 太空搜密 by Kevin Lustig The universe is a big place. In all of that space, humans have discovered many things that both fascinate and mystify us. Tune in to the National Geographic Channel this month to learn about some intriguin

发表于:2018-12-08 / 阅读(48) / 评论(0) 分类 常春藤解析英语

1. Peak people: 人口顶峰。这个词组就是指世界人口达到最高值的时期,之后的人口数量会因为出生率的降低或全球能源、食物、水资源匮乏而呈稳定下降的趋势。据说我们已经 reached peak people,

发表于:2018-12-18 / 阅读(70) / 评论(0) 分类 实用英语

B:美语训练班上课啦! 我是Donny。 A: 我是杨琳! Donny, 今天你来介绍咱们的节目内容吧! B: With pleasure! 今天,咱们摇〗矸慷土? 要看看到异国他乡求学的感受,要聊聊用瑜伽减轻压力, 还要告诉大家

发表于:2018-12-25 / 阅读(101) / 评论(0) 分类 美语训练班

A hypervelocity star appears to be the remains of a three-star system, one star of which was digested by the Milky Way's black hole, with the other two being combined and hurled away. Heres what scientists think happened, oh, about a hundred million

发表于:2019-01-02 / 阅读(93) / 评论(0) 分类 60秒科学

分集介绍:这堂课主要讲述了多普勒频移效应以及它的测量和运用。多普勒频移效应分为红移和蓝移,红移用于短波,蓝移用于长波。然后教授举了两个多普勒频移的例子,一是黑洞双星的发

发表于:2019-01-05 / 阅读(77) / 评论(0) 分类 麻省理工学院公开课:振动与波

[全屏观看] 点击右键- 另存为 可保存这个Flash影片 游戏说明: 方向键控制人物的移动,不能碰四面的任何东西,把看到的钥匙全拿到就可以过关

发表于:2019-01-08 / 阅读(37) / 评论(0) 分类 英语操作敏捷小游戏

Hello, I'm Jerry Smit with the BBC News Shares on China's main stock market have fluctuated sharply in the hours of trading since the country's security's regulator lifted the safe mechanism introduced to prevent sharp falls. The market in Shanghai o

发表于:2019-01-19 / 阅读(52) / 评论(0) 分类 中英双语新闻

It's like trying to pick out an individual inside the middle of a busy city, with lights and cars, and things happening all around them. But that wasn't the only problem. Vast, swirling clouds of dust and gas prevent visible light from the centre of

发表于:2019-01-23 / 阅读(59) / 评论(0) 分类 探索与发现2013年

It's clear that it will come very close to the black hole, might even hit the black hole. So maybe we actually are feeding the black hole here. Now exactly how much and how fast of all these is completely unknown and that's the excitement about it be

发表于:2019-01-23 / 阅读(43) / 评论(0) 分类 探索与发现2013年

To stare into the void of a black hole, to tumble through space before disappearing forever within it, it's the prospect of catching that unique moment that explains the excitement of this year's events. What happens to matter once it's been swallowe

发表于:2019-01-23 / 阅读(86) / 评论(0) 分类 探索与发现2013年

Here then is the strange paradox of black holes: the defeating black hole is anything but black. Just how greedy and bright a black hole can get is revealed by an aptly very ordinary looking galaxy called Cygnus A, some 650 million light years away.

发表于:2019-01-23 / 阅读(53) / 评论(0) 分类 探索与发现2013年

This summer, I set out to get to the bottom of a story thats captured the headlines. And this one, Ive got some experience myself, because Im also a beekeeper. There, is that good? Yeah, its perfect. Ok, I hate squeezing like that. I met some scienti

发表于:2019-01-23 / 阅读(45) / 评论(0) 分类 探索与发现2013年

Science and technology 科学技术 Table-top astrophysics 桌面上的天体物理学 How to build a multiverse 怎样构建多元宇宙 Small models of cosmic phenomena are shedding light on the real thing 微小模型逐步揭开宇宙中各种现象

发表于:2019-02-02 / 阅读(42) / 评论(0) 分类 经济学人科技系列

Science and technology 科学技术 Table-top astrophysics 桌面上的天体物理学 How to build a multiverse 怎样建立一个多元宇宙 Small models of cosmic phenomena are shedding light on the real thing 宇宙现象的一些小模型反映了

发表于:2019-02-02 / 阅读(124) / 评论(0) 分类 经济学人科技系列

Four months after the historic first-ever detection of gravitational waves, scientists said they have directly detected another gravitational wave washing over the Earth. 在引力波历史性的首次检测到四个月之后,科学家们近日表示

发表于:2019-02-02 / 阅读(93) / 评论(0) 分类 英语新闻

主演:丹尼斯奎德詹姆斯卡维泽肖恩道尔伊丽莎白米切尔安德烈布拉格诺亚艾姆雷克梅丽莎埃里克丹尼尔汉森Jordan BridgesStephen JoffeJack McCormackPeter MacNeillMichael Cera玛琳辛科Richard SaliNesbitt Blaisde

发表于:2019-02-05 / 阅读(73) / 评论(0) 分类 看电影学英语

这首插曲出自乐队Soundgarden,当grunge红遍大街小巷时,nirvana占据了绝大部分风光。soundgarden无论从感染力,深度,力度上来看,他们丝毫不差于nirvana。在演奏技巧上,他们甚至超过了nirvana。

发表于:2019-02-11 / 阅读(59) / 评论(0) 分类 影视英文歌曲

【原文】 Black HolesWhat is a black hole? Well, it's difficult to answer this question, since the terms we would normally use to describe a scientific phenomenon are inadequate here. Astronomers and scientists think that a black hole is a region

发表于:2019-02-16 / 阅读(48) / 评论(0) 分类 英语听力广播—Listening