calling card

基本解释

'It was a real calling card, ' he adds.
他又补充说，这是一张真正的名片。
These resources are your calling card, these resources are your recruiting tool.
这些资源是你的呼叫卡，同时也是你吸收同道中人的吸铁石。
And when it was done, when her agonal struggles had ceased, you left us a calling card.
当一切都结束时，当她痛苦的挣扎停止时，你给我们留下了一张名片。

Unfortunately for Tiger, class has not been his predominant calling card over the last 2 years.
FORBES: Tiger Woods Caddie Shacks Steve Williams: A Fair Way To Split Or Out Of Bounds?
New Orleans has cashed in on their historical calling card as a festive host city.
FORBES: Superdome Shutdown: Super Bowl XLVII Blackout Hurts New Orleans' Chances to Host Future Super Bowls
This stretched-out calling card rolls laboriously to the finish line—yet Dupieux saves his sharpest inspiration for a trick ending.
NEWYORKER: Rubber

(PHONE) a card that allows the user to make calls from anywhere and charge it to his or her home phone account
(VISIT) (in the past) a card with their name on it that a person left after they had made a formal visit to someone else's house, etc.

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.
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.