Cách sử dụng
The expression "in the line of duty" is used when someone is performing their job or official duties and something happens to them. It means that they were injured, harmed, or killed while doing their job or duty. For example, a police officer who was shot while chasing a criminal was injured "in the line of duty." It is often used to honor or recognize the dedication and sacrifice of people who work in dangerous or difficult professions, like police officers, firefighters, and soldiers.