keyed serial file

例句：

1. 1.This software allows you to key in your data into a keyed serial file.
   这款软件允许您将数据输入到键入的序列文件中。
2. 2.The company uses keyed serial files to store customer information securely.
   该公司使用键入的序列文件来安全地存储客户信息。
3. 3.The technician had to key in the serial file manually because the computer was out of order.
   技术人员不得不手动输入序列文件，因为电脑出了故障。