含糊地说 抿着嘴嚼英释中释
He bumped into someone and mumbled an apology..他撞到一个人，咕哝着道了歉。
Stop mumbling!.别嘟嘟囔囔的！
He could hear the low mumble of Navarro's voice..他能听到纳瓦罗的低声咕哝。
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