personal identification number
Longman Dictionary of Contemporary English 5++LDOCE 5++ˌpersonal identifiˈcation ˌnumber noun [countable] BFBa pin 个人身份识别号码,私人密码
Examples from the Corpus
personal identification number• To defend against loss or theft, the cards usually require the user to enter a personal identification number as well.• Users will be required to enroll in the service and obtain a personal identification number.ˌpersonal identifiˈcation ˌnumber nounChineseSyllable
Corpus pin a

