channel-check handler

例句：

1. 1.The channel-check handlers ensure that all passengers are properly screened before boarding.
   通道检查员确保所有乘客在登机前都经过适当的安检。
2. 2. The channel-check handlers were responsible for monitoring the security measures in place during the event.
   通道检查员负责监督活动中的安全措施。
3. 3.The channel-check handlers were called upon to assist with the emergency response after the incident occurred.
   在事件发生后，通道检查员被召来协助紧急响应工作。