剑桥英语五级考试(MSE)阅读难句解析45例5
来源:优易学  2011-10-10 11:59:48   【优易学:中国教育考试门户网】   资料下载   外语书店

  21.Studies by Hargrave and Geen estimated natural community graz-ing rates by measuring feeding rates ofindividual zooplankton species in thelaboratory and then computing community grazing rates for field conditionsusing the known population densityof grazers.

  由哈格雷夫和吉恩所进行的研究,对自然条件下的群落食草比例进行了估计,其手段是通过测量出实验室内单独的浮游动物种类的结食比例,然后利用已知的食草动物种群密度,计算出实地状况下的群落食草比例。

  22.In the periodsof peak zooplankton abundance,that is,in the late spring and in the summer,Haney recorded maximum daily com-munity grazing rates,for nutrient-poorlakes and bog lakes,respectively,of 6.6 percent and 114 percent of daily phytoplankton production.

  在浮游动物数量激增的高峰期,亦即在春季后期以及夏季,哈尼记录了最大程度上的每日群落食草比率,对于营养物不充足的湖和沼泽湖而言,分别为每日浮游植物繁殖量的6.6%和114%.

  23.The hydrologic cycle,a major topic in this science,is the complete cycle of phenomena through which water passes,beginning as atmospheric water vapor,passing into liquid and solid form as precipitation,thence along and into the ground surface,and finally again returning to the form of atmospheric water vapor by means of evaporation and transpiration.

  水文循环,作为该学科中的一个主要课题,指的是水所经过的诸现象的整个循环过程,开始时是作为大气中的水蒸气,转而作为雨、雪、露、雹一类的降水量经过液体和固体形态,由此而沿着地层表面分布或进入地层表面,最终通过蒸发和散发作用再度回复到大气水蒸气的形态。

  24.The historian Frederick J. Turner wrote in the 1890’s that the agrarian discontent that had been developingsteadily in the United States since about 1870 had been precipitated by theclosing of the internal frontier——that is,the depletion of available new landneeded for further expansion of the American farming system.

  史学家弗雷德里克.杰.特纳于十九世纪九十年代著述美国约自18世纪70年代以来一直在持续不断发展的农民不满,由于国内边远地区的封闭而更趋加剧——亦即是说,美国农业系统进一步扩展所必需的可资利用的新土地几近耗竭。

  25.In the early 1950’s,historians who studied preindustrial Europebegan, for the first time in large numbers,toinvestigate more of the preindustrial European population than the 2 or 3 percent who comprised the politicaland social elite:the kings,generals,judges,nobles,bishops,and localmagnates who had hitherto usually filled history books.

  二十世纪五十年代早期,研究前工业化时代欧洲的史学家,首次以众多的人数,开始调查前工业化时代欧洲人口中的大多数,而非那些构成了政治与社会精英阶层的百分之二或三的人口,即国王、将军、法官、贵族、主教、以及地方上的达官显贵,而正是这部分人一直到那时为止普遍充斥于史学著作。

责任编辑:mman

文章搜索:
 相关文章
文章搜索:
热文排行
联系MSE考试编辑
外语频道最新资讯