penfriend;pen pal ;
例句:
I am looking for a German pen-pal. Please email me.
我正在找德国的笔友,请发电子邮件给我.
Do you think your pen pal's writing is good or bad?
你认为你的笔友书写工整或凌乱?
What do you intend to send your pen-friends this Spring Festival?
7今年春节你打算给你的笔友寄点什么?