n.扩音器，喇叭筒，传声筒

原形：megaphone复数：megaphones

He used a megaphone to address the crowd at the protest.
他在抗议活动中使用扩音器向人群讲话。
The football coach shouted instructions through a megaphone during practice.
足球教练在训练时通过扩音器发出指令。
The emergency services used a megaphone to communicate with people trapped in the building.
应急服务人员使用扩音器与被困在建筑物中的人沟通。
The megaphone amplified her voice, making it heard across the noisy street.
扩音器放大了她的声音，使她在嘈杂的街道上也能被听到。
The lifeguard on duty used a megaphone to warn swimmers about the strong current.
当值的救生员用扩音器警告游泳者有强流。
The rally organizer held a megaphone to ensure his message reached the entire crowd.
集会组织者手持扩音器，确保他的信息传递给所有人。
The police officer used a megaphone to dispersal the demonstration peacefully.
警察使用扩音器和平疏散示威人群。
The tour guide utilized a megaphone to give commentary on the historical landmarks.
导游使用扩音器对历史地标进行讲解。
During the fire drill, the alarm was accompanied by announcements via a megaphone.
在消防演习中，警报声伴随着扩音器的广播。
The concert promoter tested the megaphone before announcing the next performer.
音乐会推广人在宣布下一位表演者之前测试了扩音器。