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GRE阅读考试难句训练法(1)

发布时间:2016-03-01  编辑:查字典英语网小编

  1. It is one of natures great ironies that the availability of nitrogen in the soil frequently sets an upper limit on plant growth even though the plants leaves are bathed in a sea of nitrogen gas.下述情形真可谓是自然界的一个莫大讽刺:土壤中所能获得的氮肥量往往对植物的生长构成了一个上限,虽然植物的叶子被沐浴在一片氮气的海洋中。

  难句类型:复杂修饰

  解释:It是形式主语,其真正的内容是that之后的由even though连接的两个句子。其实本句的真正难度倒不在于句子的结构,而是对于其意思的理解:尤其是文科同学,可能缺乏必要的背景知识,就更不容易读懂。句中的set an upper limit on plant growth直译为给植物的生成设立一个上限,其真正的意思是限制了植物的生长因此the availability of nitrogen in the soil frequently sets an upper limit on plant growth之中的availability一定指的是氮的供给之少。整句话的意思是,土壤中的氮植物能够利用,却太少;而空气中虽有大量的氮,植物却不能利用,这岂不是自然界开的一个大玩笑。

  It is one of natures great ironies that the availability of nitrogen in the soil frequently sets an upper limit on plant growth even though the plants leaves are bathed in a sea of nitrogen gas.

  2. Unless they succeed,the yield gains of the Green Revolution will be largely lost even if the genes in legumes that equip those plants to enter into a symbiosis with nitrogen fixers are identified and isolated,and even if the transfer of those gene complexes,once they are found, becomes possible.

  除非他们能取得成功,不然的话,绿色革命的产量收益将在很大程度上损失殆尽,即使豆科植物中使这些植物有条件进入到与固氮细菌共生关系的基因可被辨识出来和分离开来的话,且即使这些基因综合体,一旦被发现之后,其移植得以成为可能的话。

  难句类型:复杂修饰、插入语

  解释:主句比较简单,而后面跟着的由and连接的两个表示让步的条件状语从句就相对复杂,第一个从句是用一个修饰主语的定语从句that equip those plants to enter into a symbiosis with nitrogen fixers把主谓隔开;第二个从句则运用了插入语once they are found把主谓隔开。

  意群训练:Unless they succeed,the yield gains of the Green Revolution will be largely lost even if the genes in legumes that equip those plants to enter into a symbiosis with nitrogen fixers are identified and isolated,and even if the transfer of those gene complexes,once they are found, becomes possible.

  3.One such novel idea is that of inserting into the chromosomes of plants discrete genes that are not a part of the plants natural constitution:specifically,the idea of inserting into  nonleguminous plants the genes,if they can be identified and isolated,that fit the leguminous plants to be hosts for nitrogen-fixing bacteria. Hence, the intensified research on legumes. ,此句最好能够熟读,更好的是背诵下来。

  这其中的一个新颖思想就是,在植物的染色体内注入并非是该植物自然构造一个部分的那些不相关联的因基:具体而言,这一思想是,在非豆科植物内注入这样一些基因,倘若这些基因可被辨识出来并被分离开来,而这些基因业已使豆科植物宜于充当那些具备固氮作用的细菌的寄主。由此,对豆科植物的研究日趋深入。

  难句类型:复杂修饰、插入语、倒装、省略

  解释:本句的难度以倒装为主,复杂为辅;然而二者相互借力,难度更大,而且本句中有两个省略,就更令读者头痛。

  句子一开始的One such novel idea is that of 之中的that of, 是that idea of 的省略形式。此外容易理解,后面开始变难。Inserting into the chromosomes of plants discrete genes看上去不舒服的原因,是作者在此用了一个便装;正常语序应该是:inserting discrete genes into the chromosomes of plants, 即把非此植物的genes插入到该植物中。之所以倒装,是因为discrete genes加上复杂修饰的成分以后太长之故。同样,后面的the idea of inserting into nonleguminous plants the genes, if they can be identifyied and isolated, that fit the leguminous plants to be hosts for nitrogen-fixing bacteria一句,正常的语序也是the idea of inserting the genes, if they can be identifyied and isolated, that fit the leguminous plants to be hosts for nitro-fixing bacteria into nonleguminous plants,即把便利豆科植物成为固氮菌的寄主的基因插入到非豆科植物的基因中去。这一回。Genes之后不但有定语从句的复杂修饰,而且在genes和that从句之间还有一个不短的插入语,增加了阅读难度。

  最后的一句话,Hence, the intensified research on legumes, 其实也不是一句话,只是一个词:research。作者省略了there is ,其实引处即便看不清语法结构,作者的意思还是可以懂的。因此,笔者在前面强调的如果可以看懂意思,不必去分析语法,在实战的应用中有其意义;GRE和GMAT中很多表达其实不严格遵守语法,或者有考生不懂的语法,读者处心积虑地研究它们,不但没有实战意义,而且还令读者徒增烦恼。

  本句是GRE和GMAT考试中集各种语言现象之大成者,包括了几乎所有的难句类型,希望读者一定把这句话读熟;有心者最好能把它背熟,一定对提高你的阅读能力有好处。

  意群训练:One such novel idea is that of inserting into the chromosomes of plants discrete genes that are not a part of the plants natural constitution:specifically,the idea of inserting into nonleguminous plants the genes,if they can be identified and isolated,that fit the leguminous plants to be hosts for nitrogen-fixing bacteria. Hence, the intensified research on legumes.

  

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