"he spoke in an audible whisper"
I had rather have their silent Prayers, than their audible ones.
The hubbub must have been audible to Miss Jackson outside.
He could hear a distant banging and shouting, but it was scarcely audible over the noise of the celebration.
牛津高階第八版
美國韋氏詞典
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維基百科 (自由的百科全書)