闸门监视长

例句：

1. 1.The gatekeeper at the museum is responsible for monitoring the security of the exhibits.
   博物馆的看门人负责监控展品的安全。
2. 2.The gatekeeper was assigned to ensure that only authorized personnel could enter the restricted area.
   看门人被分配的职责是确保只有授权人员可以进入禁区。
3. 3. The gatekeeper had to check all visitors' IDs before allowing them access to the building.
   看门人在允许访客进入大楼之前必须检查他们的身份证。