pen pal

US /ˈpen pæl/
UK /ˈpen pæl/
"pen pal" picture
1.

筆友

a person with whom one exchanges letters, especially regularly, but who is not a close friend

:
I've had a pen pal in Japan for five years.
我在日本有一個筆友五年了。
She enjoys writing to her pen pal about her daily life.
她喜歡給她的筆友寫信,講述她的日常生活。