We keep in touch by E-mail on the Internet.

我们通过在英特网上发送电子邮件联系。

youdao

After he left China, we keep in touch by E-mail.

他离开中国以后，我们用Email保持联系。

youdao

After he left China, we keep in touch by E-mail.

他离开中国以后，我们用Email保持联系。

youdao