名词
中文翻译：Unknown
同义词：
['ambient noise', 'background sound']
例句：
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1. Theroom was filled with the constant background noiseof traffic.
房间里充满了交通的持续背景噪音。
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2. The movie's score is aperfect blend of background noise and foreground action.
电影的音乐完美地融合了背景噪音和前景动作。
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3. Theconcert hall was filled withthe soft background noise of chatter and laughter.
音乐会厅里充满了闲聊和笑声的轻柔背景噪音。