Ahum
a. 低唱的, 輕哼的\\nadv. 低唱
??? 情景例句
He's a nice man.
他是個好人。
The milk in the refrigerator has begun to turn sour.
冰箱里的牛奶開始腐敗了。
Thank you for the beautiful present!
感謝你漂亮的禮物！