If the driver gets stuck or frustrated or loses his train of thought, the navigator and driver can switch roles.

如果驾驶员停滞不前或受到挫折或者失去了思路，导航员和驾驶员可以互换角色。

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Read your neighbor's newspaper, switch seats on the train, or watch a new television program.

读读你邻居的报纸，火车上换个座位，或者看看新的电视节目。

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An experimental unit for measuring instantaneous speed of high speed train passing through tunnel with a photoelectrical switch is designed.

设计了一套采用光电开关测量高速列车进出隧道瞬时速度的实验装置。

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Sucking up all the air behind it, the train gave the switch a merciless working over.

NEWYORKER: Among Animals and Plants

Throw the switch before you send this train careening off a cliff.

FORBES: Butterflies, Trains And The National Debt

He said they managed to switch lines which slowed the runaway train so it came to rest as it reached an incline near Warren Street station in central London.

BBC: Runaway Tube train: Operators fined ?300,000