I am learning a nice ELL post, which uses a word "exchange"
I think of this as part of an exchange ...
I was not familiar with this meaning of the word "exchange", so I looked it up on Cambridge Dictionary, and got this definition about "exchange"
a short conversation or argument
I guess the part pointed out by red rectangle is a conversation between A and B and is also an exchange.
Is my understanding right?
No, they are not interchangeable because exchange represents a more general concept than conversation.
An exchange according to the Cambridge Dictionary
the act of giving something to someone and them giving you something else
A conversation is an exchange where you give and receive words (or information).
But if you want groceries and offer money in exchange, a simple purchase, that act is not a conversation.
A conversation implies an exchange but an exchange does not always imply a conversation.
