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听力等级

科学研究   

2022-03-25   Video
3D Printing for Paleontology

Keywords:

3D printing is fairly new to Palaeontology. It allows scientists to print their own replicas of fossils based on X-ray scans of the originals. One of the most famous fossils to be scanned is Lucy: ...

3D 打印对于古生物学来说是相当新的。 它允许科学家打印自己的复制品基于原件 X 射线扫描的化石。 最着名的扫描化石之一是 Lucy:一个大约 320 万年前死亡的人类亲戚。 现在,研究人员认为他们已经弄清楚了露西是怎么死的:从树上掉下来。...


2022-03-24   Pre-Intermediate
Man First Walked on the Surface of the Moon

Keywords:

On a cold October day in nineteen fifty-seven, the Soviet Union launched a small satellite into orbit around the Earth.Radio Moscow made the announcement."The first artificial Earth satellite in the w...

在 1957 年 10 月的一个寒冷的日子,苏联将一颗小型卫星发射到环绕地球的轨道上。 世界上第一颗人造地球卫星现已诞生。 第一颗卫星今天在苏联成功发射。 世界上第一颗卫星被称为 Sputnik 1。 人造卫星是苏联在与美国的冷战中取得的重...


2022-03-23   Video
DNA Cloning with Plasmids

Keywords:

A common technique in genetic engineering is to insert a new gene into a loop of bacterial DNA called a plasmid. The molecular tool used to cut DNA is a restriction enzyme, such as Eco...

一种常见的技术在基因工程中是将新基因插入一个称为质粒。 分子工具用于切割 DNA是一种限制酶,例如 EcoRI。 该酶具有精确的形状允许它沿着双螺旋槽 /在 EcoRI 的情况下进行扫描对于基字母序列GAATTC。 然后,酶将质粒在这个特定...


2022-03-21   Intermediate
Is Your Food Contaminated

Keywords:

Steve: So, the article is called, "Is Your Food Contaminated?". Is my food contaminated? Fischetti:Well, I hope not personally. However, there seems to be a greater chance that it could be or at leas...

Steve:所以,这篇文章叫做“你的食物被污染了吗?我的食物被污染了吗?Fischetti:嗯,我个人希望不是。 然而,它似乎有更大的可能性,或者至少现在有更大的意识。 Steve:为什么我们等到现在才让这种意识变得如此伟大?Fischet...


2022-03-21   Video
Science Fiction or the Future of Mankind

Keywords:

It's hard to get to space. As much as we all wish there were an easy, and affordable way to see our planet floating in the dark. Right now, the only way is to become an astronaut or a billionare. ...

很难进入太空。 尽管我们都希望有一个轻松的,以经济实惠的方式观察我们的星球漂浮在黑暗中。 现在,唯一的办法就是成为一名宇航员或亿万富翁。 但有一个概念这可能会使它成为可能- 同时作为起点为了探索宇宙——太空电梯。 它具体是如何工作的?了解太...


2022-03-19   Intermediate
The Revolution in Brain Science

Keywords:

Nicholson: One of the center points of the book is this idea of neuroplasticity and neurogenesis, so I guess we should start by explaining what those are. Begley: Neuroplasticity means just what the ...

Nicholson:这本书的中心点之一是神经可塑性和神经发生的概念,所以我想我们应该先解释一下它们是什么。 Begley:神经可塑性的含义就是这个词的两个部分所暗示的,神经是指大脑,而可塑性是指大脑改变自身、改变其结构和功能的能力。 因此,...


2022-03-19   Video
Proxima Centauri - Our Solar System’s Closest Stellar Neighbour

Keywords:

In the last few decades, astronomers have discovered thousands of new worlds: exoplanets of all shapes and sizes, orbiting distant stars. But it seems that there was an undiscovered planet hidden...

在过去的几十年里,天文学家发现了数千个新世界:各种形状和大小的系外行星,绕着遥远的恒星运行。 但似乎有一个未被发现的星球一直隐藏在我们的鼻子底下。 它被发现围绕一颗红矮星运行称为 Proxima Centauri这是我们太阳系最近的恒星邻居...


2022-03-17   Intermediate
Technological Approaches to the Technological Threat

Keywords:

Walter: You know there is a famous or infamous quip, you know, that Scott McNeilly who was the founder and is the CEO of Sun Microsystems made a few years ago, and he said, "Privacy is dead, get over ...

Walter:你知道有个着名的或臭名昭着的俏皮话,你知道,Sun Microsystems 的创始人兼首席执行官 Scott McNeilly 几年前说,“隐私已经死了,克服它吧。 你知道,隐私已经死了吗?Sweeney:嗯,假设它受了重伤...


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