In the virtual world, each participant was stationed at a railroad switch where two sets of tracks veered off.

在这个虚拟的情境中，受试者都被安排在两个轨道的岔道口。

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They placed 147 subjects in a 3-d virtual environment where they are in front of a railroad switch controlling two tracks.

他们在3d虚拟环境中安排了147个站在一个可以控制两条铁轨的铁轨岔口的志愿者。

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Switch off the engine when stopping for lengthy period, e. g. at traffic lights, railroad crossings or in traffic congestions.

在长时间停车时关闭引擎，比如等待信号灯时，在铁路平交道口时，或者交通阻塞时。

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Usually one route is more direct than the other, and if a mining company has sidings and a branch line linked to one railroad it cannot quickly and easily switch to another.

ECONOMIST: American railways

But the connection from Hoboken down to the World Trade Center tunnels is still severed, as the railroad awaits delivery of a replacement track switch.

WSJ: PATH's Road Back Is Rocky