access control word

例句：

1. 1.The access control word is a crucial partof the security system.
   访问控制字是安全系统的关键部分。
2. 2. The access control word waschanged to prevent unauthorized access.
   访问控制字被更改以阻止未经授权的访问。
3. 3. The access control word was used toidentify the authorized users.
   访问控制字用于识别授权用户。