fog signal

名词 n.
中文释义

英文释义

名词 n.
  1. A small explosive charge (detonator) which can be placed on a railway line in fog, to be detonated by a train passing over it as a warning signal to the driver. UK
    — The layman does not realise the dreadful nightmare of running in fog, especially at night, when the safety of everyone depends on the driver hearing the fog signal detonate.

词形变化

fog signals plural
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