柯林斯词典pen pal (also pen-pal) (pen pals) 1. N-COUNT A pen pal is someone you write friendly letters to and receive letters from, although the two of you may never have met. 笔友 返回 pen pal剑桥词典someone who you exchange letters with as a hobby , but usually have not met 笔友 I've got a pen pal in Australia . 我在澳大利亚有个笔友。 返回 pen pal