考研英语阅览《经济学人》读译参阅Day2157_This_they_事物

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text 2157

群居行为协助恐龙控制地球

01

this is scientific american’s 60-second science. i’m christopher intagliata.just like cows, sheep and bison roam in herds today, so, too, did plant-eating dinosaurs.and it appears they began flocking together much earlier than we used to think—just as the jurassic period was beginning to unfold.(this is) a critical time in the evolution of dinosaurs.(this is) pretty early on. so the idea is: this type of social behavior, may actually contributed to the evolutionary success of dinosaurs.jahandar ramezani of the massachusetts institute of technology is a

geochronologist. in his words …i date things. and i date old things, things in the millions and billions of years—not the really young stuff.

译文

这儿是科学美国人——60秒科学系列，我是克里斯托弗·因塔利亚塔。就像今日的奶牛、绵羊和野牛三五成群地游荡相同，食草恐龙也是如此。它们集合在一同的时刻如同比咱们曩昔认为的-—侏罗纪时期初步呈现，要早得多。这是恐龙进化的要害时期。这是恰当早的。所以这个主意是:这种这种社会行为类型，可以实践上有助于恐龙进化成功。麻省理工学院的贾汉达尔·拉米扎尼是一位地质年代学家。他说……我断定事物的年代。我对陈旧的事物，对数百万、数十亿年前的事物进行了年代测定，而不是那些实际上年青的事物。

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in this case, ramezani was dating tiny zircon crystals, in fact,in a fossil bed in patagonia, near the southern tip of south america.those crystals dated back to nearly 193 million years ago.and the fossils preserved there—an array of nearly 200 specimens of a plant eater named mussaurus patagonicus—provide a snapshot of the dinosaur at all stages of its life.eggs and hatchlings, clumps of juveniles and then—further out—adults.so this kind of undisturbed distribution of fossils and this kind of age segregation basically shows these dinosaurs had a social structure.they lived in a colony. and everybody has got things to do—duties—with respect to the young and the juveniles.the study—in the journal scientific reports—suggests dinosaurs developed complex social behavior 40 million years earlier than previously thought.

译文

在这个事例中，拉米扎尼在接近南美洲南端的巴塔哥尼亚的化石层中测定细小的锆石晶体的年代。这些晶体可以追溯到近1.93亿年前。保存在那里的化石——一组近200个食草动物的标本，名为巴塔哥尼亚鼠龙(mussaurus patagonicus)——供给了这种恐龙一切生命期间的快照。卵和刚孵化的幼崽，成群的幼崽恐龙化石，远远多于成年的恐龙化石。所以这种未受烦扰的化石分布和这种年纪阻隔根柢上阐明晰这些恐龙有一个社会规划。他们居住在群落里。关于幼崽来说，每个都有自个的作业要做—责任。这项宣告在《科学陈述》杂志上的研讨标明，恐龙打开出凌乱的社会行为的时刻比之前认为的要早4000万年。

03

and ramezani says the work also advances long-standing questions about the social structure of dinosaurs.was it more like primitive taxa like the crocodiles?or did it look like more evolved types of animals like birds and mammals?and we’re beginning to see that, yes, it looks more like a mammal- or bird-type colony.whatever type of social structure it was, the scientists hypothesize that it helped large plant eaters first spread across the planet—kick-starting tens of millions of years of dominion on earth.thanks for listening for scientific american’s 60-second science. i’m christopher intagliata.

译文

拉米扎尼标明，这项作业还推进了关于恐龙社会规划这一长时刻存在的疑问。它是不是更像鳄鱼那样的初始类群?仍是它看起来像进化的动物类型，比方鸟类和哺乳动物?咱们初步发现，是的，它看起来更像哺乳动物或鸟类的群落。不管它是哪种社会规划，科学家们假定它首要协助大型食草动物在地球上扩展，翻开了其在地球上数千万年的控制。谢谢我们收听科学美国人——60秒科学。我是克里斯托弗·因塔利亚塔。回来搜狐，查看更多

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