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听力等级

科学研究   

2021-11-09   Video
Asexual vs. Sexual Reproduction

Keywords:

We're going to do a head-to-head contest between asexual cloning and sexual reproduction. And I'm going to need-- perhaps you've been wondering what these fruits and vegetables are for up here ...

我们将 进行正面交锋 无性克隆之间 和有性繁殖。 我要 需要 - 也许你已经 一直想知道这些水果是什么 蔬菜是给这里的 在——你注意到这些了吗? 所以我需要四名志愿者。 我需要四名志愿者。 现在,我需要三个 女性和一...


2021-11-08   British English
Infantile Anaemia - Blood Simple

Keywords:

Science and Technology 【infantile anaemia】 Blood simple 【A small change in how babies are delivered might abolish infantile anaemia】 CHILDHOOD anaemia is a problem. Around the world, almost a quar...

科技 婴儿贫血 简单的输血 分娩方式的简单改变可能帮助消灭婴儿贫血 儿童贫血症是一个全球性的问题,将近四分之一的五岁以下儿童忍受着该病的折磨,使得我们无法忽视它。儿童身体和智力的发育,都会受到铁元素匮乏的影响,因为除...


2021-11-07   Intermediate
The GLOBE at Night Project

Keywords:

Steve: Captain Moore, I really appreciate you calling in. Moore: Oh, not a problem. Thanks for having me. Steve: It's our pleasure. Can you tell me, first of all, over the years it has been call...

史蒂夫:摩尔船长,我非常感谢您的来电。 Moore:哦,没问题。谢谢你邀请我。 Steve:这是我们的荣幸。你能告诉我吗,首先,这些年来它一直被称为炮弹冲击,然后是战斗疲劳,现在显然是战斗压力。您能定义一下战斗压力吗? M...


2021-11-05   Intermediate
Talk with Eric Kandel

Keywords:

Dr. Kandel, great to talk to you today. Kandel: Steve it's wonderful to talk to you. Steve: And I want you to begin with your background. You went from an interest in being a psychoanalyst to a ...

Kandel 博士,很高兴今天与您交谈。 Kandel:Steve,很高兴能和你交谈。 Steve:我希望你先从你的背景开始。你从对成为一名精神分析学家的兴趣变成了一名心灵分子生物学家——不是心灵,我们稍后会谈到这一点。我知道我...


2021-11-05   Video
The Discovery of Ribozymes

Keywords:

RNA is an informational molecule. If one would want a simple analogy for it, you might use the analogy of a video tape. It has a linear array of information, which by itself is typically thought of no...

RNA 是一种信息分子。如果有人想要一个简单的类比,你可以用录像带来类比。它有一个线性的信息阵列,通常认为它本身什么都不做,就像 VCR 磁带什么都不做,除非你有一台机器把它放进去,还有一个监视器来查看图像,但它是信息的仓库。这些信息位称为...


2021-11-03   Video
How a Pathogenic E. coli Infection Begins

Keywords:

So here's our bacterium here and behind it will be these long strands that are the bundle forming pillus. They're going to adhere to the microvilli, these wiener-like structures, this is what's on...

所以这是我们的细菌,在它后面是这些长链,它们是束 形成 pillus。 他们将粘附在微绒毛上,这些类似维纳的结构,这是 正常肠道表面有什么。 它来到这里,然后细菌导致这些 东西消失,然后开始依偎在表面。 它被锁定,然后是 要下来,它...


2021-11-01   Intermediate
The Genetics of Longevity

Keywords:

Let's talk about the genetics of longevity. Conventional wisdom always had it that ageing was a function of normal maintenance mechanisms going awry as you got older. Guarente: Well! I think there ...

让我们谈谈长寿的遗传学。传统观点总是认为,衰老是随着年龄的增长,正常维护机制出错的功能。 瓜伦特: 嗯!我认为这个想法有一定的道理,但必须记住的是,有时衰老是受到调节的,这实际上是从人们开始改变实验动物的饮食时就知道的,他们注意到卡路...


2021-11-01   Video
ATP in Use

Keywords:

Adenosine triphosphate, or ATP, is the molecule that powers all life on Earth. Energy from ATP is required for essential activity, including pumping ions across membranes and pulling apart the DNA he...

三磷酸腺苷或 ATP 是为地球上所有生命提供动力的分子。需要来自 ATP 的能量 基本活动,包括将离子泵送穿过膜和拉开 DNA 螺旋。 ATP 分子由三个主要结构组成:腺嘌呤核碱基、核糖和三个 磷酸盐。当固定末端磷酸基团的键断裂时,能...


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