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听力等级

科学研究   

2022-04-28   Video
Why We Should NOT Look For Aliens

Keywords:

The Universe is incredibly big and seems full of potential for life, with billions of habitable planets. If an advanced civilization had the technology to travel between the stars, at just 0.1% of ...

宇宙非常大,而且似乎很满具有生命的潜力,拥有数十亿的宜居行星。 如果一个先进的文明拥有这项技术在星际之间旅行,只需 0。 1%它能以光速殖民我们的星系大约需要 1 亿年。 考虑到数十亿,这并不长银河系已经存在多年了——所以原则上任何太空文明...


2022-04-26   Intermediate
Cold Dark Matter & the Milky Way's Missing Satellites

Keywords:

Simon: We have a theory right now called cold dark matter, which describes the structure of the universe on large scales and how galaxies form within that structure; and so when you look at the univer...

Simon:我们现在有一个理论叫做冷暗物质,它描述了大尺度宇宙的结构以及星系是如何在该结构中形成的;所以,当你观察宇宙,遥远的宇宙时,该理论的预测与观测非常吻合,这真的很了不起。 问题在于,当我们真正放大并详细观察单个星系时,我们开始发现理...


2022-04-26   Video
Frog Tongues Slurp Supper

Keywords:

This cricket is about to be dinner. New research reveals what makes a frog's tongue such a formidable weapon. Since the entire attack takes less than a tenth of a second the researchers set up hi...

这只蟋蟀快要吃晚饭了。 新研究揭示了青蛙舌头的构成如此强大的武器。 由于整个攻击花费的时间更少比十分之一秒研究人员设置高速摄像机捕捉动作。 “从字面上看,眨眼间,那只昆虫就消失了只有当我们看待它时慢动作我们才能真正看到舌头从嘴里张开,并且影...


2022-04-24   Intermediate
Miguel Nicolelis and Mind-Powered Robots

Keywords:

Soares: In 2004 you gave [a] really impressive demonstration of how your work could lead to prosthetics controlled by the brain. Your star monkey, Aurora, learned to play a simple videogame with a joy...

Soares:在 2004 年,您做了一个令人印象深刻的演示,展示了您的工作如何导致由大脑控制的假肢。 你的星猴 Aurora 学会了用操纵杆玩一个简单的电子游戏,但你基本上也是从她的大脑下载神经信号来控制机器人手臂。 Nicolelis:...


2022-04-24   Video
PPAR-gamma Activation in the Fat Cell

Keywords:

What I'm going to show you is the adipose tissue, which was next to some muscle tissue, and we zoom in on it, we see that the adipose tissue is composed of millions of individual cells. ...

我将向您展示的内容是脂肪组织,它旁边是一些肌肉组织,我们放大它,我们看到脂肪组织由数百万人组成的单个细胞。 我将重点介绍一个单元作为模型,但请记住这个事件在所有牢房中进行和脂肪组织已经包含在您的数据包中我们昨天看了一下。 这是脂肪细胞它包含...


2022-04-22   Intermediate
The Telephone Gambit

Keywords:

Steve: Hi Seth! How are you today? Shulman: Good, thanks! How are you Steve? Steve: Pretty good. Good to talk to you. So, The Telephone Gambit, chasing Alexander Graham Bell's secret. You know, as w...

Steve:嗨,Seth!你今天感觉如何?舒尔曼:好的,谢谢!你好吗,史蒂夫?Steve:相当不错。 很高兴与您交谈。 所以,The Telephone Gambit,追寻亚历山大·格雷厄姆·贝尔的秘密。 你知道吗,当我们翻开所有的牌时,秘...


2022-04-20   Intermediate
Are There Microbial Aliens On Earth

Keywords:

Steve: Dr. Davies, great to talk to you today. Davies: Hi Steve! Steve: This is a fascinating kind of thought experiment at this point; actually it's more than a thought experiment, but let's talk a...

Steve:Davies 博士,很高兴今天与您交谈。 Davies:嗨,史蒂夫!Steve:在这一点上,这是一个引人入胜的思想实验;实际上,这不仅仅是一个思想实验,但让我们谈谈我们中间的外星人,以及外星人——为什么我们不先谈谈我们所说的外星...


2022-04-20   Video
Role of MECP2 in Gene Silencing

Keywords:

So here's the gene being transcribed, and next to it you see acetylated histones, nice open chromatin. And now you catch these little methyl cytosines. Methyl groups are appearing, and he...

所以这是基因转录,旁边你看到乙酰化组蛋白,漂亮的开放染色质。 现在你抓住了这些少量甲基胞嘧啶。 甲基出现,蛋白质来了,它束缚并会吸引这种蛋白质复合物沿着与乙酰化酶现在是乙酰基都消失了,并且组蛋白变得紧密,染色质关闭,没有转录因子可以通过并且...


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