childhood sweetheart;
例句:
She is betrothed to her childhood sweetheart.
她已跟那青梅竹马的男朋友订了婚.
Li: Do not a childhood? Also you look who the rogue?
李: 青梅竹马都不要了? 你这流氓又看上谁了?
Green plums and bamboo horse . Ok We grew up together.
这个我最拿手,叫青梅竹马.