2017考博英语阅读题源经济学人文章每日精析(八十六)

2017-02-10 17:52:39来源:网络

  be stunned by [stʌnd] :因某事而感到吃惊

  About three-quarters of their specimens showed synchronous growth peaks like those caused by modern sunspot activity. In total, the rings they measured let them study 79 years of forest growth before the eruption. During this period, the solar cycle averaged 10.6 years. That compares with 11.2 years in the modern era, although this figure conceals wide variation in the lengths of individual cycles. Within statistical limits, then, it seems that the sunspot cycle was the same in the early Permian as it is now, suggesting that the sun’s magnetic oscillations were the same then as they are at present. Whether that is a coincidence has yet to be determined, but there is no reason why the method Mr Luthardt and Dr Rössler have developed should not be applied to other petrified forests, from different periods, to find out.

  约四分之三他们观察的样本展示出了与现代太阳黑子活动相似的周期。总的来说,他们所测量的年轮能够体现出火山爆发前79年的树木生长情况。在那一时期,太阳活动周期平均为10.6年。与之相比,现代的太阳活动周期平均为11.2年,不过这个数据不包括长时间以来生物个体发生的各种各样的变化。统计学认为,因为二叠纪早起的太阳黑子周期与近代相似,那么就能够认为,现在太阳的磁振荡与那时也同样相近。这是否是一个巧合还有待考证,但这并不意味着Luthard先生与Rössler 博士自创的方法不能用来寻找其他处于不同时期的的石化森林。

  synchronous ['sɪŋkrənəs]:adj.同时的,同步的

  oscillation [,ɒsɪ'leɪʃn]:n.振幅

  petrified ['petrɪfaɪd]:adj.石化的

  注:踆乌,(“踆”读作“cūn”,),古代传说中太阳里的三足乌。《淮南子·精神训》:“日中有踆乌”。高诱注:“踆,犹蹲也。谓三足乌。”李邕《日赋》:“烛龙照灼以首事,踆乌奋迅而演成。”中国古代天文学家勤于观测,精于观测,对太阳的细微变化都进行了详细的描述。他们最早发现了太阳黑子现象。“踆乌”,原来就是太阳黑子的形象。


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