麦克风可以帮助放大演讲者的声音，让后排的人也能听清楚。

The microphone helps to ___amplify the speaker's voice so people in the back can hear clearly.

记者通过采访更多目击者来放大事件的影响。

The reporter ___amplified the incident by interviewing more eyewitnesses.

音响系统会把现场观众的欢呼声放大。

The sound system will ___amplify the cheers from the live audience.