in the line of duty
成語所屬單字duty
in the line of duty — 慣用語
1. while doing your job, especially when referring to dangerous or difficult tasks
1.慣用語
釋義
值勤時；執行公務中
while doing your job, especially when referring to dangerous or difficult tasks that are part of a particular profession.
例句
The police officer was injured in the line of duty when she stopped a speeding car.
The paramedic had seen many difficult situations in the line of duty over twenty years.