When exposed to a radio signal, they use its energy to send back the information they contain, mostly a long number identifying an object.
当这些标签暴露在无线电信号下时,它们将利用信号的能量发回其所包含的信息,这些信息大部分是用于识别物品的一长串数字。
Tom creates an atomic domain for the credit card number, identifying this as a character field (char 19).
Tom为信用卡号创建一个原子域,并将其标识为字符字段(CHAR19)。
Tom creates an atomic domain for the credit card number, identifying this as a character field (char 19).
Tom为信用卡号创建一个原子域,并将其标识为字符字段(CHAR19)。
应用推荐