都说托福阅读部分文章有难度，其实这种难度很多时候来自于文章中的长难句。这些句子结构复杂内容繁多，考生如果无法快速正确地看懂它们必然会影响对文章的理解和解题效率。所以下面小编就为大家带来托福阅读 100 个长难句的精选汇总和深度解析，为大家提供学习指点和启发。
　　 托福阅读 100 个长难句实例分析原句案例：
　　This "atmospheric engine," invented by Thomas Savery and vastly improved by his partner, Thomas Newcomen, embodied revolutionary principles, but it was so slow and wasteful of fuel that it could not be employed outside the coal mines for which it had been designed.
　　词汇讲解：
　　embody / m'b d / v. 体现 ( 想法﹑ 感情等 ) ，使 ( 想法﹑ 感情等 ) 具体化 ; 包括或含有某物
　　revolutionary /'r v 'l 'n ri/ adj. 的
　　employ = make use of sb/sth 使用
　　结构划分：
　　This "atmospheric engine," ( invented by Thomas Savery and vastly improved by his partner, Thomas Newcomen, ) embodied revolutionary principles, but it was so slow and wasteful of fuel ( that it could not be employed outside the coal mines ) ( for which it had been designed. )
　　 深度分析：
　　修饰一： ( invented by Thomas Savery and vastly improved by his partner, Thomas Newcomen, ) ，插入语，修饰 this "atmospheric engine"，大家注意这里的断句，This "atmospheric engine" embodied revolutionary principles 被隔开了，断句很重要
　　中文：由 Thomas Savery 发明并由他的搭档 Thomas Newcomen 大力改善的
　　修饰二： ( that it could not be employed outside the coal mines ) ，从句，so … that 结构
　　中文：不能在煤矿的以外的地方使用
　　修饰三： ( for which it had been designed. ) ，从句，修饰 coal mines
　　中文：引擎被设计
　　 参考翻译：这个由 Thomas Savery 发明并由他的搭档 Thomas Newcomen 大力改善的 " 大气引擎 " 体现了性的原理，但它如此慢和浪费燃料以致于不能再煤矿的以外的地方使用，尽管原来是这么设计的。