signaling system的用法和樣例：
例句
- Federal investigators are trying to determine whether problems found with a signaling system could have contributed to the crash.
聯邦調查人員試圖確定是否已發現的信號系統的問題能導致所發生的相撞事故。 - At the inquest, the accident was imputed to a mechanical failure of the signalling system.
經調查，這次事故被歸咎於信號系統中出現的一個機械故障。
