We will keep in touch with each other by sending emails, making telephone calls or writing letters.

我们会通过发电子邮件、打电话或写信来保持联系。

youdao

We must keep in touch with each other.

大家要经常通气。

《新英汉大辞典》

How do your potential community members normally keep in touch with each other?

您的社区的潜在成员一般如何保持联系？

youdao

But it is by no means clear that speed will be enough to compensate for access to sites which enable people in Iran to keep in touch with each other and with the rest of the world.

BBC: Will Iran's national internet mean no world wide web?

So we've designed the software to keep the partners in touch with each other over the Internet.

FORBES: Magazine Article