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
语法信息
有生性状态
无生命
形态构成
复合词
可数
复数形式
railway signals
例子
When the railway signal is green, the train can continue its journey.
当铁路信号是绿色时,火车可以继续它的旅程。



























