Anyone looking to book a flight this summer can see why greener, more fuel-efficient aeroplanes will be a good thing: soaring fuel prices have had a stratospheric effect on ticket prices.

想要预定今年夏天航班的人们会发现为什么更环保、更省油的飞机将是一件好事：油价飙升已对机票价格造成了较大影响。

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Autonomous flight control system and telemetry and telecontrol system of stratospheric demonstration airship are introduced firstly.

首先对平流层演示飞艇的自主飞行控制系统和遥测遥控系统进行了介绍；

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