line of duty
释义
责任范围：与某个责任领域授权、要求或通常相关的所有事项。
例句
1·A policeman was injured in the line of duty yesterday.
昨天有一名警察在执行公务时受伤。
《牛津词典》
2·More than 3,000 police officers were wounded in the line of duty last year.
去年三千多名警官在执行任务时受伤。
《柯林斯英汉双解大词典》
3·He was killed in the line of duty last year.
他去年在执行公务时殉职。
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