At its inception, the UN brought together 51 countries; it now has 193 member states. But, although the Security Council was enlarged in 1965 by increasing the number of non-permanent seats from six to ten, its permanent members have not changed since 1945.
成立之初，联合国总共包括51个成员国；如今有193个。但是，尽管安理会在1965年做了扩充，将非常任理事国的数量从六个增加到十个，但常任理事国数量自1945年以来从未改变。