实际上，空军一号是两架高级定制的波音747 - 200B型系列飞机中的一架，尾部代码分别是28000和29000。
In practice, however, Air Force One is used to refer to one of two highly customized Boeing 747-200B series aircraft, which carry the tail codes 28000 and 29000.
因两者合作开发的商谈未果，波音公司正加紧推出747扩展型；而空中客车公司也在设计全新的A3XX型客机。
Now that talks on a joint project have broken down, Boeing is pushing a stretched version of the 747, and Airbusis designing an all-new aircraft, known as the A3XX.
在国家支持下，该航空公司进行为期三年的重组，计划裁减三分之一的员工，砍掉31条航线(包括国内和国际航线)，撤下耗油量大的波音747 - 400s型大型客机。
Under a three-year, state-backed restructuring, the carrier will shed a third of its staff, cut 31 routes (domestic and international) and retire its fleet of fuel-thirsty Boeing 747-400s.
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