音乐：背景音乐音量适中，电视操作正常。
Music: moderate volume of the background music, television normal operation.
她用颤抖的手指把收音机音量放低，使圣诞音乐渐弱成柔和的背景声。
With shaky fingers, she lowered the volume of her radio so that the Christmas music faded to a muted background.
你可以播放轻柔的音乐背景或用高音量爆炸几小时。
You can play soft background music or blast it out at high volume for hours.
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