In the next smaller room works an engineer on duty he 's there to reply any technical questions .
工程师就在操作室旁边的小屋子里值班，他的工作就是处理任何技术上出现的问题。
She was supposed to check in with the boy on duty twice a shift but she didn 't bother because nothing ever happened .
她本应该在一个班次里查看两次值班的男孩，但她没有去，因为什么都没有发生过。
After a brief negotiation with the doctor on duty he handed over his money and the doctor admitted the girl to the intensive-care unit .
他和值班的大夫简单地寒暄了几句，就把钱递了过去，这个大夫让女孩住进了特护病房。
Now the hospital has set up a security post in the middle of the sprawling compound though three guards on duty were napping or otherwise not watching during a recent visit by the associated press .
Wednesday 's incident came as the federal aviation administration was updating decades-old rules governing how long commercial pilots can fly and remain on duty .
