英语四六级的学习中必不可少的就是长难句，小编为大家整理了英语长难句例句分析，希望对大家提升四六级成绩能够有所帮助，一起学起来吧~
73. In general, our society is becoming one of giant enterprises directed by a bureaucratic (官僚主义的) management in which man becomes a small, well-oiled cog in the machinery.
语言点：
（1）句子主干为our society is becoming one of giant enterprises，directed...为过去分词作后置定语修饰enterprises，in which引导定语从句
（2）well-oiled cog 好上油的齿轮
句意：总的来说，我们的社会正在变成一个由官僚主义经营指导的巨大企业，其中人们成为机器渺小的、好上油的齿轮。
74. Experts suggest that speech stages are reached in a fixed sequence at a constant age, but there are cases where speech has started late in a child who eventually turns out to be of high IQ.
语言点：
（1）该句为并列复合句，that从句为宾语从句，where从句为定语从句，who从句为定语从句
（2）in a fixed sequence 按照固定的顺序
（3）turn out to be结果是，turn out to do sth.最后做某事
句意：专家指出人按照固定的顺序并在一定的年龄进入说话阶段，但是也有一些孩子开始说话晚，最后成为高智商者的例子。
75. The researchers made great progress in the early 1970s, when they discovered that oncogenes, which are cancer-causing genes, are inactive in normal cells.
语言点：
（1）when从句为非限定性定语从句，that从句为宾语从句，which从句为非限定性定语从句
（2）make great progress in... 在……中取得重大进展
句意：研究者在 70 年代早期取得了巨大进展，他们发现致癌基因，即那些可以引起癌症的基因，在正常细胞中是不活动的。
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