However, after several weeks, their verbal communication became more developed.

In particular, however, we should note the matter of verbal communication.

This often takes the form of written or verbal communication.

When verbal communication is possible, the participants can speak and then listen.

Being told - verbal communication by the parent and teacher.

Difficulty with verbal communication, including problems using and understanding language.

There were even experiments in verbal communication going on now.

Or maybe still do make any form of verbal communication?

Perhaps there were written records, but history was clearly kept alive by verbal communication.

As uncertainty is further reduced, the amount of verbal communication will increase.