Lauder, who has tested out the jetpack twice, said when you're on the ground and preparing for takeoff, there's a lot of vibration and noise.

Lauder已经测试过这种飞行器两次了，认为当你在地上准备起飞时，飞行器会产生巨大的震动和声响。

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A a vertical takeoff aircraft is one that can rise straight from the ground.

垂直起飞飞机是一种能竖直地离地升空的飞机。

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Sixteen hours after takeoff, the Vimy's wheels touched ground.

起飞后十六个小时，“维米号”的双轮着陆了。

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But at 95 degrees Fahrenheit and 5, 352 feet above sea level, with no takeoff flaps, we needed more ground speed.

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Cellphones are banned during entire flights not just during takeoff and landing because they can interfere with ground-based antenna capacity.

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Traces on the ground show that the plane veered toward the left of the runway as it neared takeoff.

CNN: graphic