“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：强调实际地、按要求去履行应尽的职责或任务。例如：All employees must perform their duties diligently.（所有员工都必须认真履行自己的职责。）
exercise one's responsibilities：更侧重于主动地运用、承担责任 。例如：Managers should exercise their responsibilities to ensure the smooth running of the project.（管理者应履行其职责，确保项目顺利进行。）