Sitting in cramped metal containers in bases across America, they fly their machines by remote control from thousands of miles away, via satellite links.

驾驶员坐在美国各处基地的狭窄的金属操控室里，通过与卫星的通信而从几千里外的地方对他们的飞机进行着远程操控。

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Electricity, meanwhile, is delivered via a conductive brush that sweeps around a metal ring in the stationary base.

同时，固定地基上有一个(供电的)金属环，房子通过绕着此环旋转的导电刷来获得电能。

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That will include more practical alternatives to the metal plate, perhaps delivering energy via a patch on the skin.

他们还想到了许多方案来替代金属薄片，比如说通过在皮肤上的一块补丁来传输能量。

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Supplies -- such as food, clothing and letters -- are sent down to the miners via metal cylinders known as "carrier pigeons" through the second bore hole.

CNN: STORY HIGHLIGHTS

This 7km-long white-knuckle adventure combines hiking, climbing over smooth rock slabs alongside waterfalls, ziplining over a surging river and navigating wild canyons via bridges and metal rungs.

BBC: North America by cable and bridge

The electrodes send information, via a small metal box that rests in the doctor's pocket, to a remote computer which stores and processes the data.

BBC: NEWS | Health | Tricky birth delivery aid created