The smaller the bird, for example, the more agile the flying — a swan may need the equivalent of two football fields to take off and get lift, while a hummingbird can rise like a helicopter.

例如，鸟类的体型越小，飞行动作就越灵敏——天鹅就需要两个足球场大的面积才能完成起飞和抬升动作，而蜂鸟就可以像直升机一样垂直起飞。

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An Indian coast Guard helicopter and ship take part in an exercise off the coast of Porbandar in the Arabian Sea in December 2008.

印度海岸警卫队直升机和船只参加了2008年12月在阿拉伯海的Porbandar沿海进行的演习。

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On the basis of the need of the lamplight for the helicopter to take off or touch down at the warship, the standard of the electromagnetic compatibility is considered.

根据直升机起飞、着舰时所需的助降灯光使用要求，考虑电磁兼容性标准，详细介绍了灯光助降系统的主机板、电源板、驱动电路、故障检测电路等硬件设计过程。

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Reading West MP Alok Sharma has called for the helicopter to take off and land further away from the house to reduce the noise.

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We take off by helicopter from America's main research base in Antarctica toward Cape Royds, where exactly 100 years ago, in 1908, scientists started studying the local penguin colony.

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They are the biggest purchaser of the revolutionary Osprey tiltrotor, which pivots its engines so it can take off like a helicopter, but fly as far and fast as a fixed-wing plane.

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