我们在做题和阅读的过程中，长难句都为我们带来很多理解上的困扰。长难句的解析和学习也成为我们降低语言阅读障碍必不可少的学习内容。

我们在学习长难句时除了理清句子结构

Their analysis ruled out the possibility that it was firms' political influence, rather than their CSR stand, that accounted for the leniency: Companies that contributed more to political campaigns did not receive lower fines.

句子主干：(Their analysis主语)(ruled out谓语)(the possibility宾语)

从句：

1.that it was firms' political influence, that accounted for the leniency为同位语从句，解释possibility, it was (firms' political influence主语), that(accounted for谓语) the (leniency宾语)为强调句型，it is....that...

2.Companies did not receive lower fines为补语，冒号后面可以跟句子对前面内容进行补充说明

3.that contributed more to political campaigns为that引导的定语从句，that指代companies并作定语从句主语

理解句子大意：

参考译文：他们的分析排除了让公司受到宽大处理的原因是其政治影响力而非其企业社会责任立场的这种可能性：对政治活动投入更多的公司并没有处以更少的罚金。

同时也可以复习词汇

词汇扩充：

Rule out:排除;不予考虑

If you rule out a course of action, an idea, or a solution, you decide that it is impossible or unsuitable.Leniency(不可数名词)[ˈliːniənsi]: 仁慈;宽大

Leniency is a lenient attitude or lenient behaviour.

The judge rejected pleas for leniency and sentenced him to six months in prison...

法官驳回了宽大处理的请求，判处他6个月的监禁。

Lenient adj.(惩罚或执法时)宽大的，宽容的，仁慈的

对于高频词汇可以通过阅读英文解释加强自己的理解，这样在整个长难句学习中你的词汇、语法、分析句子能力都能同时得到全面的巩固提升。