现在，我们用这种方法将前面所列的几个“钉子”拔下。
If we define the "security" our image of various parts of the total system as the probability of their suffering significant changes, then we would reverse the order of hardness and see the social sciences as the most secure, the physical sciences as the least secure, and again the biological sciences as somewhere in between.
很显然，If we define the "security" our image of various parts of the total system as the probability of their suffering significant changes,是条件从句，句子的主干是we would reverse… and see…as …,…as …, and …as ….,从句的主干是If we define … as…
At the same time, the politicians demand of scientists that they tailor their research to ‘economics needs’, that they award a higher priority to research proposals that are ‘near the market’ and can be translated into the greatest return on investment in the shortest time.
At the same time,为状语，that are ‘near the market’ and can be translated into the greatest return on investment in the shortest time.是一个定语从句，句子的主干是the politicians demand of scientists that…,that…两个that引导的均为宾语从句。
When we learn that the distinguished professor assuring us of the safety of a particular product holds a consultancy with the company making it, we cannot be blamed for wondering whether his fee might conceivably cloud his professional judgment.
When we learn that the distinguished professor assuring us of the safety of a particular product holds a consultancy with the company making it, 是一个状于从句，其中嵌套一个宾语从句that the distinguished professor assuring us of the safety of a particular product holds a consultancy with the company making it, assuring us of the safety of a particular product 是现在分词短语做professor的后置定语，making it做company的后置定语，it指代的是a particular product, 句子的主干是we cannot be blamed for …，wondering whether his fee might conceivably cloud his professional judgment.是一个动名词短语，做for的宾语，其中嵌套宾语从句whether his fee might conceivably cloud his professional judgment.，在宾语从句中，cloud作动词，是“玷污”的意思。
在单词和长难句问题基本上解决了之后，有些同学仍然不能再考试中取得阅读部分高分，一个重要的原因是阅读速度太慢。很多同学承认，如果有一个小时到八十分钟的时间用来做六级阅读，得分将有大幅度的提高。然而，考试不相信虚拟语气。阅读速度慢的主要原因是对单词和句子结构不熟练。很多同学在阅读中看到一些单词后，第一反应是这个单词我 曾经背过，但具体是什么意思，要么想不起来了或者需要几秒钟的时间才能想起来，这样，阅读速度就慢了下来，一个完整的信息，被思考单词的过程搞得支离破碎。在一些比较长的句子方面，也因为需要花较长的时间去识别和破解句式，因而影响了阅读速度。很多同学因为对一些词汇和句式不熟练，结果边读边翻译成汉语，才能理解文章说了些什么，甚至在读完后面的一些句子后，忘掉了前面句子的表达内容，从而需要回读才能够理解作者表达的完整信息。所有这些，就会极大地降低阅读速度。如果现在让我们去读高中的英语课文，我们肯定不用译读和回读，因为我们对文章所涉及到的单词和句子结构太熟悉了，就如同我们听到How are you?不用再想汉语什么意思就知道该怎么回答一样。
提高熟练程度的主要方法是有效的重复，这是人类乃至动物学语言的基本原则。有效的重复是指在把句子所涉及到的词汇和句式彻底搞清楚的情况下，再阅读很多遍，达到很熟练甚至能够背诵的程度，这样，在下次阅读中如果出现类似的词汇和句子结构，就能够很快的识别出来，从而最大限度的降低花在思考词汇含义和识别句式上的时间，从而有效的提高阅读速度。
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