Definition: to reduce the level of sound or heat that something produces Level: B1
我让他把暖气调低。
I asked him to ___turn ___down the heating.
我需要调低音量，因为太吵了。
I need to ___turn ___down the volume because it's too loud.
她母亲打电话时，她把音乐调低了。
She ___turned the music ___down when her mother called.
