croon
/kru:n; krun/ v [I, Ipr, Tn, Tn.pr]
~ (sth) (to sb) hum, sing or say (sth) softly and gently 柔情地轻哼、 轻唱或低声述说（某事物）
croon soothingly (to a child) （给孩子）低声唱歌
croon a sentimental tune 轻哼感伤的曲调
croon a baby to sleep 低声哼唱哄婴儿睡觉
`What a beautiful little baby,' she crooned. ｀多麽逗人爱的小宝贝儿啊,＇她柔声细语地说.