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科学研究   

2025-06-15   Video
Where Does the Periodic Table End

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Scientists created the first artificial elements during World War II, and they were actually classified at first, and it was only afterward that they were allowed to announce the discovery ...

科学家创造了第一批人造元素 在第二次世界大战期间,他们实际上是 起初是机密,后来才 他们被允许宣布这一发现 这些新元素。 创建新元素时,基本的 idea 是你有一个目标 而你有一束其他的东西,并且 ...


2025-06-11   Video
Scientists Attempt to Replace BPA in Food and Drink Cans

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A ubiquitous chemical called Bisphenol A, better known as BPA, coats the inside of many food and drink cans. This lining is 2 micrometers thick, less than 1/8th of the thickness of a human hai...

一种普遍存在的化学物质,称为双酚 A, 更广为人知的是 BPA,覆盖在许多 食品和饮料罐。 此衬里厚 2 微米,小于 人类头发粗细的 1/8。 它是金属和 确保 一罐苏打水会保留它的嘶嘶声和味道。 因为它便宜...


2025-05-30   Video
How NASA’s Rover Search for Signs of Ancient Life on Mars

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This is Jezero crater. Today, it is a hostile landscape too bitterly cold and dry for any living thing to survive. A few billion years ago, however, Jezero might have looked similar to Earth’s own ...

这是 Jezero 陨石坑。今天,这是一个充满敌意的景观,太过寒冷和干燥,任何生物都无法生存。 然而,几十亿年前,Jezero 可能看起来与地球上位于土耳其的萨尔达湖相似。 那时,火星拥有更厚的大气层。 它使地球变暖,足以...


2025-05-26   Video
Threatened Pools in Mexican Desert Hold Clues to Early Life

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Situated amidst an arid desert, the stunning blue pools are hard to miss. These freshwater pools, or pozas, are located in Cuatro Ciénegas, a butterfly-shaped basin nestled in the mountain...

坐落在干旱的沙漠中, 令人惊叹的蓝色泳池不容错过。 这些淡水池或 pozas 位于 在 Cuatro Ciénegas,一个蝴蝶形的盆地 坐落在墨西哥北部的山区。 超过 300 个 pozas 横跨大约 800...


2025-05-21   British English
‘Digital Twin’ Represent the Future of Manufacturing, Part 2

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But it was possible to use data transmitted from the damaged spacecraft to recreate the problems, and thus explore ways around them. The idea of using a purely digital model for engineering spread ...

但可以使用从受损航天器传输的数据来重现问题,从而探索解决方法。随着计算机能力的提高,以及复杂的设计和制造程序的出现,使用纯数字模型进行工程设计的想法也得到了传播。还开发了用于结构分析和计算流体动力学等方面的专用软件,这些软件可用于探索空气动...


2025-05-21   Pre-Intermediate
New Study Examines How Elephants Say ‘Hello’

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People greet each other in many ways. They might say “hello” in different languages. They might physically do something like shaking hands, giving hugs, or exchanging kisses. Elephants seem to have m...

人们以多种方式互相问候。他们可能会用不同的语言说“你好”。他们可能会做一些身体上的事情,比如握手、拥抱或交换亲吻。 大象似乎也有很多问候。最近的一项研究提供了有关这些问候的新信息,包括问候如何根据动物的性别以及它们是否看着对方而有所不同。...


2025-05-19   British English
‘Digital Twin’ Represent the Future of Manufacturing, Part 1

Keywords:

When a factory has secrets to protect it is not unusual for security staff to ask that no photos be taken. This industrial campus in Milton Keynes, north-west of London, however, is particularly ca...

当工厂有秘密需要保护时,安保人员要求禁止拍照并不罕见。然而,位于伦敦西北部米尔顿凯恩斯的这个工业园区却特别谨慎。它是红牛车队的所在地,这支一级方程式车队参与了一场竞争激烈的比赛,其工程水平非常先进,以至于大多数制造商都望尘莫及。红牛雇佣了大...


2025-05-18   Video
Can Scientists Solve Darwin's 'Abominable Mystery'

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In 1879, Charles Darwin wrote to his colleague Joseph Dalton Hooker about an “abominable mystery" in the fossil record. He was perplexed at how rapidly major families of flowering and frui...

1879 年,查尔斯·达尔文 (Charles Darwin) 写信给他的同事 约瑟夫·道尔顿·胡克 (Joseph Dalton Hooker) 谈一个“可憎的谜团” 在化石记录中。 他对各大家族的速度之快感到困惑 ...


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