Station staff announced the arrival of the train over the tannoy.车站工作人员通过扩音器广播了火车进站的消息。Station staff announced the arrival of the train over the tannoy.车站工作人员通过广播告知火车到站了。An announcement crackled over the tannoy.扩音器里吱吱嘎嘎地播出一则通知。The train's approach was announced over the tannoy.广播里通知火车就要进站了。