1.扩音器;喇叭筒,喊话筒;传声筒
1.用喇叭筒喊话;广泛宣传
1.a device shaped like a funnel, used to channel the voice in one direction and increase its volume
1.to speak using a megaphone, or say something through one
1.the director stood around megaphoning orders.
导演站在附近用喇叭筒下达命令。