White and black music, not to mention American and British music, have always existed in this type of back-and-forth cultural exchange.

A back-and-forth exchange between the two went on for several seconds.

Most controversial issues dogging the league were discussed in a back-and-forth exchange.

In all, answering the question took nearly 10 minutes, partly because of the back-and-forth exchange over the Internet chat service.

One student taking careful notes recorded such back-and-forth exchanges as this one, which began with a question from Mr. Gore.

The talks were not conducted between union and management negotiators, but were instead a series of back-and-forth exchanges in which the mediators met independently with both sides.

A decision is handed down that there will be two debates using rules that do not allow for back-and-forth exchanges, despite Bartlet's wishes.

Not quite the debate she hopes for yet, but Ms. Brill said she was optimistic that other candidates would be taking part in a back-and-forth exchange shortly.

John Leland writes that the loser of the Dozens is the one who takes his opponent's words at face value, therefore ending his own performance in the back-and-forth exchange.

In these circumstances, reciprocal exchange can be divided in two types: dyadic back-and-forth exchange (reciprocity), and pooling (redistribution).