他俩用电子邮件保持联系已有好几年了的翻译：They kept in touch by email to have several years 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

They keep in touch by e-mail has been for several years

They kept in touch by email to have several years

Those two use the email maintenance relation to have several years

Both of them have been using the e-mail contact several years

They kept in touch by email to have several years