Dear Tom， The day after tomorrow is my birthday. Imagine, there are already twenty years behind me! No wonder I feel old! My parents are giving a dinner party to mark the party. The first person they wish to invite is you, my childhood pal. Indeed, all of those 20 years are more or less associated with you. We'll be expecting you any time after six. See you then. Yours， XXX ( 落款写在右下角，标点是逗号)
dear tom, i have not seen you for a long time, and i miss you so much. and the day after tomorrow is my birthday, and i hope you can come to my birthday party. i am looking forword to you.