她戴上耳罩来减轻吵闹的音乐声。
She wore ear covers to ___muffle the loud music.
他用围巾裹住铃铛，让声音不那么响。
He ___muffled the bell with a scarf to make it less noisy.
他用围巾捂住嘴巴来减小说话声。
He ___muffles his voice with a scarf when he speaks.
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