交换名片

1. 名片
A calling card is a small card with personal information about you on it, such as your name and address, which you can give to people when you go to visit them.

1. a distinguishing characteristic or behavior

e.g. bombs are a terrorist's calling cards

2. a printed or written greeting that is left to indicate that you have visited

Synonym: visiting cardcard

3. a card that is used instead of cash to make telephone calls

Synonym: phone card