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听力等级

科学研究   

2024-03-31   British English
DNA Grants Researchers a Glimpse of Neanderthal Family Life, Part 2

Keywords:

Mitochondrial DNA is passed intact from mother to offspring. It is not involved in sexual mixing, so it changes only by the random process of mutation. The lack of mutations that might have distingu...

线粒体DNA会原封不动地由母亲遗传给后代。它不参与有性生殖中的基因重组,所以只有在随机突变中才会发生变化。文中提到的两个个体的DNA不存在能够将彼此区分开来的突变,这不仅表明他们有共同的祖先,而且说明这个共同祖先存在的时间并不十分久远。 ...


2024-03-30   Intermediate
Ira Flatow and the Teachable Moment, Part 3

Keywords:

Ira Flatow: We make it lower, understandable enough and I would – The kind of Web site I’d like to build would be more socially interactive. I’d like to crowd source questions. Let’s use al...

Ira Flatow:我们让它更低,足够容易理解,我会—— 我想构建的那种网站将更具社交互动性。我想众包问题。让我们利用所有这些人,所有这些学生。让我们让他们帮助我们解决有关科学的问题,让我们帮助他们解决有关生物学或全球变暖的问题或提出想...


2024-03-30   Video
The Most Extreme Explosion in the Universe

Keywords:

Supernovae are the most powerful explosions in the universe, unleashing enough energy to outshine galaxies. We have no real metaphor for their power – if the sun were to magically go supernov...

超新星是 宇宙,释放出足够的能量来超越 星系。我们没有真正的隐喻来描述他们的力量 – 如果太阳神奇地变成超新星,那 会觉得你被能量击中了 核爆炸,每一秒。好几个星期。 虽然超新星是创造的引擎, 锻造使生命成为可能的...


2024-03-29   British English
DNA Grants Researchers a Glimpse of Neanderthal Family Life, Part 1

Keywords:

DNA grants researchers a glimpse of Neanderthal family life. Fresh from his award a couple of weeks ago of a Nobel prize for his work on the DNA of early human species, including Neanderthals, Svan...

DNA让研究人员得以一窥尼安德特人的家族生活。几周前,诺贝尔奖颁给了斯万特·帕博(或者更准确地说,他和他的团队),以表彰其在例如尼安德特人等早期人类物种的DNA方面所做出的贡献,斯万特·佩博不久前在《自然》杂志上发表了迄今为止关于尼安德特人...


2024-03-28   Intermediate
Ira Flatow and the Teachable Moment, Part 2

Keywords:

Ira Flatow: You have to find the gatekeeper. I did science on CBS for a couple of years and the only reason why I was able to do it was because the producer enjoyed science and he didn’t mind...

Ira Flatow:你得找到看门人。我在 CBS 做了几年科学工作,我能够做这件事的唯一原因是因为制片人喜欢科学,他不介意让科学记者来谈论科学,因为他知道如果你以正确的方式呈现它,你就可以让它变得有趣,人们会喜欢它,他们真的很喜欢这个片段...


2024-03-28   Video
What Would Happen If the Ocean Was Transparent

Keywords:

Oceans cover roughly 70% of the Earth's surface, but so far, humans have explored less than one percent of what lies beneath. Now, imagine, instead of the oceans looking murky like this: T...

海洋覆盖了大约 70% 的 地球表面,但到目前为止, 人类探索的 地下的百分之一。 现在,想象一下,而不是 海洋看起来浑浊,如下所示: 他们像这样清晰地表示: 是什么让这些水域变得浑浊? 嗯,很多东西来自...


2024-03-26   Intermediate
Ira Flatow and the Teachable Moment, Part 1

Keywords:

Mariette DiChristina: Now it is my truly distinct pleasure to ask a friend and also the host of Science Friday to come to the stage, Ira Flatow. I have to say Ira I’ve been a science journalist for 25...

Mariette DiChristina:现在,我非常高兴邀请一位朋友,也是科学星期五的主持人 Ira Flatow 上台。我不得不说 Ira,我做了 25 年的科学记者,采访你可能是我发现到目前为止我的工作中最令人生畏的事情之一,这个人专...


2024-03-26   Video
What Would Happen If Earth Lost All Its Coral Reefs

Keywords:

What if we lost all of our coral reefs overnight? Ocean diving would become less impressive, that's for sure. But what about the marine ecosystems they sustain? This is WHAT IF, and here...

如果我们在一夜之间失去了所有的珊瑚礁怎么办? 海洋潜水将变成 没那么令人印象深刻,这是肯定的。 但是海洋呢 他们维持的生态系统? 这就是 WHAT IF, 以下是将要发生的事情 如果所有的珊瑚礁都消失了。 ...


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