多年来，气体标准、烟火使用、激光、超声波、猫头鹰标本和无线电控制的模型飞机，这一切都尝试着将鸟从跑道上吓跑。
Over the years, everything from gas canons, pyrotechnics, lasers, ultrasound, stuffed owls and radio-controlled model aircraft have been tried to scare birds away from runways.
坐火车，别坐飞机 ：很多人还没意识到这些优良的旧火车排放的污染气体要比飞机少得多，而且还能多载客。
Trains instead of planes : Many haven’t realised this yet but those good old trains emit much less pollution and can carry more passengers than aircraft.
最便宜的方案是使用巨型空中加油飞机——例如美国空军的KC-10“补充者”空中加油机（KC-10 Extender），装满二氧化硫和硫化氢气体。
The cheapest option could be to use giant mid-air refuelling aircraft, such as the US air force's KC-10 Extender, filled with sulphur dioxide or hydrogen sulphide gas.
应用推荐