求翻译：滥用及不当行使自由裁量权所为的“不合理”的行政行为，是一种违法的行为。滥用本身就是对行政相对人的歧视与不公平对待，与“公民在法律面前一律平等”的宪法原则相抵触，它侵犯了公民的合法权益。因此加强对行政自由裁量权的研究与控制是人类社会发展中不可回避的课题，是实现依法治国的最为关键的一环。是什么意思？

Abuse and improper exercise of discretion by the "unreasonable" administrative act is an unlawful act. Abuse itself is the administrative counterpart of discrimination and unfair treatment, and "citizens are equal before the law" contradicts the principles of the Constitution, it violates the legal