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He had failed in the execution of his duty.
他未能履行职责。
《牛津词典》
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He was arrested for obstruction of a police officer in the execution of his duty.
他因妨碍警察执行公务而被逮捕。
《牛津词典》
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He was arrested for obstruction of a police officer in the execution of his duty.
他因妨碍警察执行公务而被逮捕。
《牛津词典》