But he'd had no chance to find out why, or even to exchange a word with them.

They do not exchange heat, work or matter with their environment.

It may only exchange energy in the form of heat with the outside.

He might exchange information with a contact in his first group.

He exchanged a few words with her father inside the door.

I watched him exchange a few words with the boy and then leave.

I exchanged small talk with some of the men and women around the table.

He hadn't exchanged a word with her since they left.

They asked him if he was English, then exchanged looks with each other.

I tried to exchange a look with him, but he stared through me.