“行使职责”常见的英文表达有 “perform one's duties” 或 “exercise one's responsibilities” 。
perform one's duties：侧重于指实际履行、执行所应承担的任务和义务。例如：All employees must perform their duties diligently.（所有员工都必须勤勉地行使职责。 ）
exercise one's responsibilities：更强调运用、发挥自己应负的责任，带有一定的主动性和自主性意味。例如：Officials should exercise their responsibilities with integrity.（官员们应该廉洁地行使职责。 ）