A pen pal is someone you write friendly letters to and receive letters from.

笔友是指你给别人写友好的信 并收到别人的来信

Philip is looking for a pen pal in Britain.

菲利普正在寻找一位英国的笔友。

This letter is from your Australian pen pal.

这是来自澳大利亚的笔友的信。

My pen Pal is from Australia.

我的笔友来自澳大利亚。

I really want a Chinese pen Pal.

我真的想交一个中国的笔友。

My pen Pal speaks three languages.

我的笔友讲三种语言。