exchange

1 - The exchange of information on food safety emergencies should be between official contact points designated by the competent authorities.

2 - People in small societies commonly exchange goods with each other and with people in other small societies through systems of barter, ceremonies, and gifts.

3 - High population density leads to greater exchange of ideas and skills and prevents the loss of new innovations.

4 - Many historians believe that the clash between the Hyksos and the Egyptians resulted in the exchange of important military innovations for the Egyptians.

5 - For centuries people have used the postal system to exchange ideas with others in distant places.