这是他第一次用电子邮件与笔友交流的翻译：This was his first by e-mail and a pen pal Exchange 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

This is the first time he used e-mail pen pal exchange

This was his first by e-mail and a pen pal Exchange

This is he first time exchanges with the email and the pen pal

This is the first time that he had used e-mail exchange with pen pals

This was his first by e-mail and a pen pal Exchange