兩者沒有任何區(qū)別，其意思是筆友，美式英語中，常用pen pal，英式英語中，常用penfriend。例如make a pen pal交個(gè)筆友、a pen pal from Beijing來自北京的一個(gè)筆友、a penfriend in American在美國的筆友等等。筆友是一種借著書信往來而發(fā)展出來的友誼關(guān)系，通常為未見過面而與之友好地繼續(xù)通信的人。

例句：1、The penfriend society has been set up for the purpose of promoting friendship.

建立筆友會是為了促進(jìn)友誼。

2、I have not received any message from my penfriend for almost half an year.

我已經(jīng)大約半年沒接到我筆友的消息了。

3、I would very much like to have a pen pal from Beijing.

我非常需要一位來自北京的筆友。

4、Has she been writing to her pen pal all the time？

她一直在給他的筆友寫信嗎？

5、My Russian pen pal and I have been corresponding for several years.

我的俄國的筆友和我已經(jīng)通信幾年了。