Small planes are generally costly, loud, require months of training and lots of money to operate, making flying to work impractical for most people.

小型飞机通常都很昂贵，噪音也大，驾驶这种飞机还需要数月的训练和不少资金，这一切都使得“飞去上班”成为大多数人不切实际的幻想。

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William learnt how to fly fast propeller-powered planes and helicopters during the four-month RAF training.(See photo)

培训期间，威廉学习了高速螺旋桨飞机和直升机驾驶技术等课程。

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Maybe the most valuable aspect is that it can also be used for training the three planes of motion with live visual and auditory feedback.

也许最有价值的一点在于，这能通过视觉和听觉反馈来训练运动三面。

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In 2004 the Royal Air Force lost 7, 900 jobs, some training planes, an air base and a squadron of Tornados.

ECONOMIST: The armed forces

Airlines, facing bankruptcy and a sluggish economy, have been slow to implement the upgrades needed, both to the planes and ground equipment and training.

BBC: The futurist: The US�� new air traffic control system

Nigerian war planes and helicopter gunships also attacked several militant training camps in the north-east on Friday, officials said.

BBC: Nigeria army's offensive to continue 'as long as it takes'