VOA常速附字幕[翻译]:回忆2018年的重要科学回忆点

宣布时刻:2019-01-02内容来历:现金网开户学习网

For the residents of the English city of Salisbury, 2018 will be remembered as the year the nerve agent Novichok came to town. Professor Andrea Sela calls it a uniquely devastating poison. The nervous system just fires wildly, and so you get all these bizarre symptoms of paralysis and convulsions at the same time. Russian operatives are suspected of using the nerve agent, and they attempted poisoning of a former Russian spy and his daughter. The incident frayed relations between Europe and Russia.

2018 will also be remembered as the year that genetic engineering made significant advances from the techniques modest beginning with Dolly the sheep in 1997. This year, scientists cloned pigs, dogs, mules and monkeys, and gene editing techniques are now being used to create designer animals, like these Holsteins genetically engineered to be hornless. Dairy cows like Holsteins grow horns and they’re quite dangerous for human workers and also for their fellow cows.

Scientists also uncovered some odd behavior in an ancient species of the humble but painful wasp. X-rays uncovered a 30 million year-old species of parasitic wasps about the size of a grain of rice that even way back then was feeding on ancient flies. Either the host is paralyzed or it continues to feed and breathe in and live relatively normally but with this parasitoid thing, living and growing inside it and eventually of course it kills the host.

Another puzzle the natural world was solved when scientists figure out how the annoying dandelion manages to be so good at spreading through the air. Scientists are using this new information as a possible way to create micro flying objects that could stay afloat on wind currents for extended periods of time.

And finally using The Very Large Telescope in Chile, scientists were able to monitor a small star passing close to a black hole, and see how its light was distorted and warped by the black holes super gravity. The observation confirmed one of the basic predictions of Einstein’s theory of relativity. The universe is not just made up of space, but a bizarre combination of space and time that can be affected by gravity. Now that was a busy year.

Kevin Unix, VOA news. 

关于英国索尔兹伯里的市民来说,2018年的回忆点将会是诺维乔克这种神经毒剂来袭这座城市。安德里亚·塞拉教授称其为具有共同破坏力的毒药。人的神经系统会剧烈反响,并会发作古怪的症状——一起呈现瘫痪和抽搐的状况。俄罗斯人被置疑使用了这种神经毒剂,企图毒害前俄罗斯奸细及其女儿。该事情导致欧洲和俄罗斯联络发作冲突。

2018年的另一个回忆点是:基因工程获得严重前进。上一次严重前进是1997年多利羊成功克隆的技能。本年,科学家克隆了猪、狗、骡子、山公。并且人类还用基因修改的技能来发明规划动物。比方,这些毫斯坦奶牛能够经过基因工程变为无角牛。毫斯坦奶牛等奶牛长出来的角关于作业人员来说非常风险,关于同族群的牛来说亦是如此。

科学家还解密了一些远古生物的古怪行为,比方这种循规蹈矩又把人蜇得生疼的黄蜂。X射线下,咱们发现了一种3000万年前的寄生黄蜂,其巨细跟一粒米差不多。直到现在,这种黄蜂仍然以古代苍蝇为食。黄蜂的宿主只要不瘫痪,黄蜂就会持续以其为食并正常日子,寄生在苍蝇的身上,直到最终宿主逝世 。

还有一个天然国际的谜题得以解开,那就是:科学家回答了恼人的蒲公英是怎么实现在空气中如此强的散播才能的。科学家经过这项新信息作为一种途径来制作微型飞行物,这种飞行物能够凭借风流坚持漂浮很长的时刻。

最终解密的是:智利科学家用甚大望远镜观测到了一颗小恒星近距离飞过某黑洞,并观测到了这颗恒星的光是怎么因遭到黑洞的超引力而发作失真歪曲的。这次观测证明了爱因斯坦相对论的根本猜测。世界并不是只由空间组成,而是时空的奇特混合体,是能够遭到重力影响的。本年这是收成颇丰的一年。

感谢收听凯文·尤尼克斯发回的报导。

来自:现金网开户网 文章地址: http://www.newzzw.com/19/01/Normal02075054ke.html

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