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科学研究   

2025-05-15   Pre-Intermediate
Astronomers Find Super-hot ‘Super-Earth’

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Astronomers have searched for years for rocky planets outside our solar system. They have finally found one with an atmosphere. Scientists believe that a rocky planet with an atmosphere is key to sus...

多年来,天文学家一直在寻找太阳系之外的岩石行星。他们终于找到了一个有氛围的地方。 科学家们认为,有大气层的岩石行星是维持生命的关键。但天文学家发现的这颗行星没有为生命带来希望。它的表面由熔岩组成。 研究人员最近称这颗行星为“超级地球”。...


2025-05-15   British English
How the Brain Learns, Part Two

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For one thing, neurons mostly send information in one direction. For backpropagation to work in the brain, a perfect mirror image of each network of neurons would therefore have to exist in order t...

首先,神经元主要朝一个方向发送信息。因此,要使反向传播在大脑中发挥作用,每个神经元网络必须存在一个完美的镜像,以便将误差信号反向发送。 此外,人工神经元使用不同强度的信号进行通信。生物神经元发送固定强度的信号,而反向传播算法并非为处理...


2025-05-13   British English
How the Brain Learns, Part One

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Five decades of research into artificial neural networks have earned Geoffrey Hinton the moniker of the Godfather of artificial intelligence (AI). Work by his group at the University of Toronto lai...

五十年来对人工神经网络的研究为杰弗里·辛顿赢得了“人工智能教父”的称号。他在多伦多大学的研究小组的工作为ChatGPT和LaMDA等引人注目的人工智能模型奠定了基础。 这些模型可以写出连贯(虽然平淡无奇)的散文,通过医学扫描诊断疾病,...


2025-05-10   Video
What If We Built a Stanford Torus

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One day, we want to take humanity into space. But why don't we start small? Take one solar power station, 10,000 people, and 10 million tons of crumbled Moon rock, and you get a space habitat. ...

有一天,我们希望将人类带入太空。 但是,我们为什么不从小处着手呢? 以一个太阳能发电站、10,000 人和 1000 万吨碎月球岩石为例,你就会得到一个太空栖息地。 斯坦福 Torus。这个栖息地将如何运作?谁可以住在那里...


2025-05-09   Pre-Intermediate
Less or No Alcohol Is Better for Health

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Alcohol is often consumed in social gatherings from happy hours after work to birthday parties on the weekend. Drinking some alcohol is normal and believed to be good for heart health. However, new r...

从下班后的欢乐时光到周末的生日派对,社交聚会经常饮酒。喝一些酒是正常的,被认为对心脏健康有益。 然而,新的研究可能已经结束了这个想法。 Timothy Naimi 博士是维多利亚大学加拿大物质使用研究所的负责人。他说:“少喝酒是变得更健...


2025-05-07   Pre-Intermediate
Discover Milky Way’s Second-largest Known Black Hole

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Astronomers have discovered a black hole with a mass about 33 times greater than that of our sun. It is the second biggest black hole known in the Milky Way. Only the supermassive black hole at the ce...

天文学家发现了一个质量大约是太阳质量 33 倍的黑洞。它是银河系中已知的第二大黑洞。只有银河系中心的超大质量黑洞更大。 新发现的黑洞距离地球约2000光年,在《天文学与天体物理学》出版物中的一项新研究说。一光年约为 9.5 万亿公里。 ...


2025-05-06   Video
What Would Happen If a Black Hole Ate the Sun

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It's almost as old as the Universe, and as massive as 34 billion Suns. It eats stars for breakfast. And now it's about to consume ours. Behold, the great and powerful black hole with the catc...

它几乎与宇宙一样古老,与 340 亿个太阳一样大。 它早餐吃星星。 现在它即将消耗我们的。 看啊,那个巨大而强大的黑洞,它的名字很吸引人 J2157。 如果它离我们的太阳系足够近,它会以多快的速度摧毁我们?对于我们的...


2025-05-02   Video
What If a Quasi-Star Entered Our Solar System

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This rogue star has been traveling the Universe. And now, it's finally entering our Solar System. But this isn't just any regular star. It's known as a quasi-star and it's one of the biggest ...

这颗流氓星一直在宇宙中旅行。 现在,它终于进入了我们的太阳系。 但这可不是普通的明星。 它被称为准恒星,是现存最大的恒星之一。 如果这颗恒星进入我们的太阳系会发生什么?地球会受到什么影响? 这是假设,如果一颗准...


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