Rescuers used helicopters to pluck stranded residents from rooftops of houses submerged in flooding.

救援人员用直升机把困在屋顶上的居民救起，房屋被水淹没。

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Super capacitors, however, store much more energy than their traditional counterparts and are used to power small devices such as toys including model planes and helicopters.

但是，比起传统电容，超电容器能够储存更多的能量，并且可以为小的设备如模型飞机和玩具直升飞机等玩具提供电能。

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The helicopters used in the raid weren’t the first US military helicopters with stealth capability.

这次突袭行动中使用的直升机不是美军历史上第一架具有隐身能力的直升机。

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Hundreds of them died as the UN used helicopters under its mandate to protect civilians.

BBC: UN joins battle with Congo rebels

The six-man Fifa delegation used helicopters and buses to criss-cross South Africa inspecting football stadia that would be used as venues to stage World Cup matches.

BBC: Fifa 'impressed' by SA World Cup bid

The British and Russians used helicopters to counterattack the pirates, who fired machine guns and twice tried to seize the Danish ship, according to a navy spokesman.

CNN: Report: Pirates holding Chinese ship, crew of 24