这个音响系统能把音乐的声音放大，让整个房间都能听到。

This sound system ___amplifies the music so it can be heard throughout the room.

这个扬声器放大了音乐会的声音效果。

The speaker ___amplifies the sound effects at the concert.

演讲者用生动的故事来详细阐述他的观点。

The speaker ___amplifies his point with vivid stories.

这个麦克风可以放大声音信号，让远处的观众也能听清楚。

The microphone ___amplifies the sound signals so the audience in the back can hear clearly.