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Railway signal
01
铁路信号, 火车信号
a sign or light beside a railway track that tells the train driver when to stop, go, or slow down
railway signal
n
例子
Engineers regularly check the railway signals to ensure they are working properly.
A yellow railway signal warns the driver to slow down and be cautious.
When the railway signal is green, the train can continue its journey.
The train had to stop because the railway signal turned red.
The passengers were relieved when the railway signal finally changed to allow the train to move again.
