Railway semaphore signal
01
铁路臂板信号机, 铁路移动臂信号
a visual signaling device that uses a moving arm to show train drivers if they should stop or proceed
语法信息
有生性状态
无生命
形态构成
复杂复合词
可数
复数形式
railway semaphore signals
例子
When the railway semaphore signal moved its arm to the horizontal position, the train driver knew it was safe to go.
当铁路臂板信号机将其臂移动到水平位置时,火车司机知道可以安全前行。



























