extracode

例句：

1. 1. To ensure data security, extracodes are used to encrypt sensitive information.
   为了确保数据安全，使用额外的代码来加密敏感信息。
2. 2. The company introduced an extracode system to improve its customer service.
   该公司引入了一套额外的代码系统来提高其客户服务。
3. 3. The extracodes were designed to prevent unauthorized access to the system.
   这些额外的代码被设计用来防止未经授权访问系统。