游戏需要设定飞行路线，来安全引导特大喷气客机到大型跑道、引导小型螺旋桨飞机至简易跑道、以及引导直升机到直升机场。

The game involves setting flight paths to safely direct jumbo jets to the large runway, smaller prop planes to the airstrip, and helicopters to the helipad.

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那么其他的一些飞行器，比如说直升飞机，螺旋桨飞机，他们没有喷气式引擎，可以在这种条件下飞行吗？

So can other aircraft, such as helicopters or prop-planes that don't have jet engines, fly through these conditions?

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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。

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

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