board guard

例句：

1. 1. The board guard was responsible for monitoring the building's security.
   董事会警卫负责监督大楼的安全。
2. 2. The security guard at the entrance had to check all visitors before letting them in.
   入口处的保安在允许访客进入之前必须检查所有访客。
3. 3.The board guard made sure that all employees followed the company's dress code.
   董事会警卫确保所有员工都遵守公司的着装规定。