You put it into a machine, and it asks you for your PIN. " PIN" means " personal identity number" .

您将其放入机器，它会询问您的 PIN 码。 “PIN”是指“个人身份号码”。

" PIN" means " personal identity number" . So it's a number; sometimes it's four digits; sometimes it's six numbers. And it's pretty much a password.

单词" PIN" 就是" personal identity number" 它就是组数字；有时候四码；有时候六码。其实就是你的密码。