Enhanced security measures since then, combined with a rise in airline travel due to the improving economy and low oil price, have resulted in long waits at major airport such as Chicago’s O’Hare International.

语法点：介词短语做状语;形容词性短语做后置定语;介词短语做后置定语从句

单词：enhance加强;security 安全，安保;measure 措施;rise 上升;airline travel 航空旅行;improving 正在增长的;result in 导致;Chicago’s O’Hare International 芝加哥奥黑尔国际机场

解析：句子主干为“Enhanced security measures since then have resulted in long waits at major airport”。其中，“since then”为表示时间的状语，可译到整句话的开头;“at major airport”为at引导的介词短语做状语，修饰主干的谓语动词“have result in”。“combined with a rise in airline travel due to the improving economy and low oil price”为形容词性短语做后置定语修饰“security measures”，本句考察的固定搭配为：be combined with，译为“与……结合”;此外，本句中的“due to the improving economy and low oil price”，为due to引导的介词短语，表示“原因”，解释“a rise in airline travel”即“选择航空旅行人数增长”的原因。“such as Chicago’s O’Hare International”为such as引导的介词短语做后置定语修饰“major airport ”，而且“such as” 表示列举，可译为“例如”。

翻译：自那之后，安全措施有所加强，再加上选择航空旅行的人数也因经济形势好转和低油价而有所增加，这导致旅客在芝加哥奥黑尔国际机场等主要机场等候时间过长。