In the 1960s and 1970s, most personal and corporate planes were propeller or turbo-prop aircraft, which fly at a lower altitude than jetliners.

在1960和1970年代，大部分个人和企业的飞机是飞行高度低于喷气式飞机的螺旋桨式或涡轮螺旋桨式飞机。

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It has timed its push to take advantage of regional airlines' desire to replace traditional, noisy turbo-prop aircraft with sleeker, faster small jets.

正逢其时，正好可赶上区域航空公司需要以时尚的，更快的小型客机替换传统高噪音涡轮螺旋桨飞机。

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The turbo-prop, high-wing, versatile “Herc” has accumulated over 20 million flight hours. It is the preferred transport aircraft for many US Government services and over 60 foreign countries.

它采用的四发涡轮增压发动机、高单翼和尾部大型货仓设计使其已经累积飞行时间已经超过2000万小时，是美国和超过60个国家的首选运输机。

youdao

It has timed its push to take advantage of regional airlines' desire to replace traditional, noisy turbo-prop aircraft with sleeker, faster small jets.

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