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1·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。

2·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。

3·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。

4·How could space weather switch railroad signals from green to red?

空间天气怎么使铁路信号灯由绿变红呢？

5·To switch from a main railroad track to a siding.

从一主轨道转到一岔线上。