v.低声歌唱；低吟；轻哼
n.低吟声；轻哼声
She gently crooned a lullaby. 她轻声哼唱了一支摇篮曲。
The man was crooning soft words of encouragement to his wife. 这个人正柔情地对妻子说着一些鼓励的甜言蜜语。
Don't be startled by the smiling, white-haired man who croon "Merry Christmas" to you. 当你见到那向你低声哼着“圣诞快乐”面带笑容的白发老人时，不要感到吃惊。
n.低声唱歌的人或歌手
