It defines the veto in accordance with the UN Charter and Rules of Procedures of the Security Council as well as its historical background and its relationship with the modern voting mechanism.

• 尤其是在冷战时期，苏联和美国频繁使用否决权遭致诟病，要求大国慎用否决权的呼声也从来没有停止过。 大国为什么要使用否决权，大国又如何使用否决权是一个极有意义的课题，它将帮助我们更好地理解安理会的运行机制以及大国与安理会的关系。