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Achieving this goal
requires
the collaboration of educators, parents, philanthropists, businesses and policymakers alike (who will focus on helping students receive a quality, individualized education no matter the setting).
实现这一目标需要教育者、家长、慈善家、企业和政策制定者的共同努力,他们将专注于帮助学生接受高质量、个性化的教育,无论在什么环境下。
。。。实现这一目标需要无论在什么环境下都愿意专注于帮助学生获得高质量、个性化教育的教育家、父母、慈善家、企业以及政策制定者们的共同努力。
1.collaborate: to work together with sb in order to produce or achieve sth
2.business在这里是熟词僻义,表示公司、企业:a commercial organization such as a company, shop/store or factory
3.setting: a set of surroundings; the place at which sth happens
《自然》最近发表的一篇论文显示,钻石在面对超高压强时,依旧能保持原有结构,这压强已经超过地心处压强的五倍,这说明钻石很擅长承受高压。
Diamond
stands up
to a squeeze. Surprisingly, the material’s structure persists even when compressed to 2 trillion
pascals
, more than five times the pressure in Earth’s core, scientists report January 27 in Nature.
钻石经受住了挤压。科学家在1月27日的《自然》杂志上发表的文章表示,令人惊讶的是,即使压缩到2万亿帕斯卡,达到地球核心压力的五倍多,钻石依然能保持结构。
The study suggests that diamond is
metastable
at high pressures: It retains its structure despite the fact that other, more stable structures are expected to dominate under such conditions.
Studying diamond’s
quirks
at extreme pressures could help reveal the inner workings of carbon-rich exoplanets.
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研究钻石在极端压力下的特性可能有助于揭示富含碳的系外行星的内在运作方式。
Diamond is one of several varieties of carbon, each composed of a different arrangement of atoms. At everyday pressures on Earth’s surface, carbon’s most stable state is
graphite
. But given a forceful squeeze, diamond wins out. That’s why diamonds form after carbon takes a plunge inside Earth.
钻石是碳的几种变体之一,每个钻石的原子排列方式都不尽相同。在地球表面的普通压力下,碳最稳定的状态是石墨。但是,在强烈的压力下,钻石就会获胜。这就是碳进入地球内部后形成钻石的原因。
But at higher pressures than those found inside Earth, scientists had predicted that new crystal structures would be more stable. So physicist Amy Lazicki and colleagues
pummeled
diamond with powerful lasers at Lawrence Livermore National Laboratory’s National Ignition Facility in California. X-ray measurements of the material’s structure revealed that diamond persisted, suggesting it is metastable under extreme pressure.
但是科学家们预测,新的晶体结构在比地球内部压力更高的条件下会更稳定。于是物理学家艾米·拉齐基和同事们在加州的劳伦斯利弗莫尔国家实验室的国家点火装置用强激光对钻石进行了强力冲击。X射线测量材料结构的结果显示钻石仍然存在,这表明它在极端压力下是亚稳定的。
Diamond was already known to be metastable at low pressures: Your grandma’s diamond ring hasn’t
morphed
into
graphite. Once formed, diamond’s structure can persist even if the pressure drops, thanks to the strong chemical bonds that hold carbon atoms together in diamond. Now, says Lazicki, of Lawrence Livermore, “it looks like the same is true when you go to much higher pressure.”
众所周知,钻石在低压下是亚稳态的:您祖母的钻石戒指还没有变成石墨。钻石一旦形成,即使压力下降,钻石的结构也能保持不变,这归功于将碳原子结合在一起的牢固的化学键。劳伦斯利弗莫尔实验室的拉齐基说,“现在,钻石即使承受更大的压力,似乎也依然能保持稳定。”
本文节选自:Science News(科学新闻)
发布时间:2021.01.27
作者:Emily Conover
原文标题:Diamond holds up at pressures more than five times those in Earth’s core