Scientists fly in a helicopter, over the places where polar bears live.

科学家们乘坐直升飞机，飞过北极熊的栖息地上空。

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Pilots who train with this system can learn to fly blindfolded or to carry out complex maneuvers, such as holding the helicopter in a stationary hover.

经过训练而能熟练操作这种系统的飞行员就可以实现盲飞，或者进行某种复杂的飞行动作，例如让直升机稳定地停定在半空中。

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He had a helicopter landing pad built on the ship which enabled him to fly in for an occasional hour or two of filming.

他有一架停于船上停机坪的直升机，这使他能偶尔飞行1到2小时拍镜头。

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Investigators say they plan to fly around the disaster site in a helicopter equipped with a high-resolution camera, and they're using sophisticated computer models to recreate the bridge collapse, which may reveal clues about how it happened.

NPR: Cleanup Begins at Minneapolis' Collapsed Bridge

This aircraft, which has been called the most important aviation development since the invention of the jet engine, has the ability to take off and land like a helicopter yet fly horizontally at speeds far in excess of those possible for helicopters.

CENTERFORSECURITYPOLICY: Skinner Misses Cheap Fix To Air Transport Crisis

U.S. sources said a Special Forces helicopter crashed late Wednesday in Iraq's southern no-fly zone before the initial attack on Baghdad.

CNN: marines.bunker