托福閱讀高難度文章長難句實例解析：地理隔離影響物種發(fā)展

　　Geographic isolation creates opportunities for new species to develop, but it does not necessarily lead to new species because speciation occurs only when the gene pool undergoes enough changes to establish reproductive barriers between the isolated population and its parent population.

　　詞匯解釋：

　　isolation: one group, person, or thing is separate from others.

　　speciation: speciation is the evolutionary process by which new biological species arise.

　　gene pool: the gene pool is the set of all genes, or genetic information, in any population, usually of a particular species.

　　結(jié)構(gòu)分析：

　　并列復(fù)合句

　　句1 Geographic isolation creates opportunities for new species to develop，

　　句2 but it does not necessarily lead to new species because speciation occurs only when the gene pool undergoes enough changes to establish reproductive barriers between the isolated population and its parent population.

　　*其中句2含有because引導(dǎo)的原因狀從和when引導(dǎo)的時間狀從。

　　句子分析：

　　句1中

　　geograhic isolation 主語， creates 謂語，opportunities 賓語， for new species 介詞結(jié)構(gòu)作定語，to develop, 目的狀語。本部分意思：地理隔離創(chuàng)造了新物種發(fā)展的機會。

　　句子2

　　主句部分 ：but it does not necessarily lead to new species

　　it 主語，指代geographic isolation， does not necessarily lead：謂語部分， to new species：賓語。本部分意思：但它不一定會導(dǎo)致新物種

　　原因狀語從句：because speciation occurs

　　speciation是主語，occurs 謂語。

　　本部分意思：因為新物種的出現(xiàn)(產(chǎn)生)。

　　時間狀語從句：when the gene pool undergoes enough changes to establish reproductive barriers between the isolated population and its parent population.

　　the gene pool，主語;undergoes，作謂語;enough changes 賓語。

　　to establish 狀語。其中，reproductive barriers是establish的賓語。

　　between the isolated population and its parent population,介詞結(jié)構(gòu)作定語，說明是isolated population 和 its population之間的障礙。

　　本部分意思：因為只有當(dāng)基因庫產(chǎn)生足夠的變化，使得分割種群與其總?cè)褐g產(chǎn)生繁殖障礙時。

　　參考翻譯：

　　地理隔離創(chuàng)造了新物種發(fā)展的機會，但它不一定會導(dǎo)致新物種，因為只有當(dāng)基因庫產(chǎn)生足夠的變化，使得分割種群與其總?cè)褐g產(chǎn)生繁殖障礙時才會產(chǎn)生新的物種。

　　以上就是托福閱讀中長難句的訓(xùn)練分析介紹，希望大家能夠?qū)W到有效的訓(xùn)練和提升方法，讓自己更為輕松地面對長難句得到高分。