What's he burbling about?
他在嘟囔些啥？
《牛津高階英漢雙解詞典》
Misty mountains, burbling brooks, pecking chickens and scampering dogs.
山色空朦,溪水潺潺, 雞兒啄食,狗兒撒歡.
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The pigeons kept on burbling softly.
鴿子繼續咕咕軟語.
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What's he burbling about?
他在胡扯些什么呀?
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What's he burbling ( on ) about ?
他在胡扯些什 麼 呀?
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A spring bubbling and burbling along , ho , a stream gurgling and murmuring down.
泉響潺潺而泠泠兮溪流汩汩而淙淙 ﹒.
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"a novel told in burbly panting tones"