title: 以「權力平衡」分析美國對烏克蘭的外交
abstract: This article seeks to analyze US diplomatic policy toward Ukraine through the conception of ＂balance of power＂ in realism. Almost all the geopolitical actors are applying policies based on this principle of ＂balance of power.＂ The paper argues that the US policy successes in encouraging Ukraine to abandon its nuclear weapons inherited from the Soviet Union, then assure the balance of power among existing nuclear powers. However, after reviewing the US measures and resources to develop a package 