calling card

柯林斯词典

1. N-COUNT 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. 名片[美国英语] [老式]
Don't forget to give your calling card to those you'd like to see again. 别忘了把你的名片留给还想再见面的人。
2. N-COUNT If you say that someone has left a calling card, you mean that they have left evidence that shows they have been in a particular place, especially at the scene of a crime. 在场证据
John was studying the medallion in the evidence bag – the killer's calling card. 约翰正在研究证据袋里的徽章–凶手留在犯罪现场的证物。